at a distance 隔一段距離; 有相當(dāng)距離; 在遠(yuǎn)處; 在遠(yuǎn)方
distance n. 1.距離,路程。 2.遠(yuǎn)隔,遠(yuǎn)離;遠(yuǎn)處,遠(yuǎn)方。 3.(時(shí)間的)間隔,長(zhǎng)遠(yuǎn),長(zhǎng)久。 4.懸殊。 5.隔閡,疏遠(yuǎn)。 6.【音】(二音間的)音程;【繪畫(huà)】遠(yuǎn)景;【拳擊】規(guī)定的比賽時(shí)間。 The distance between the two houses was exactly one mile. 兩座房屋正好相隔一英里。 What's the distance from here to the station 從這里到車站有多遠(yuǎn)? It's quite a distance from here. 離這里遠(yuǎn)得很。 A vast distance of water surrounded the ship. 船的四周都是遼闊的水面。 Every sound carries a great distance. 每一種聲音都傳到遠(yuǎn)處。 the distance between birth and death 從生到死的這段時(shí)間。 a distance of a century 一世紀(jì)的間隔,經(jīng)過(guò)一世紀(jì)。 Our philosophies are a long distance apart. 我們的哲學(xué)觀點(diǎn)相去懸殊。 stare into the distance 向遠(yuǎn)方凝視。 the extreme [middle] distance (繪畫(huà)的)遠(yuǎn)[中]景。 treat sb. with a little distance 有點(diǎn)冷淡地對(duì)待某人。 a good distance off 很遠(yuǎn),遠(yuǎn)隔著。 at a distance 隔開(kāi)一段距離,留有間隔,不挨近 (look to advantage at a distance 遠(yuǎn)看為好)。 at a respectful distance 敬而遠(yuǎn)之。 at this distance of time 經(jīng)過(guò)這樣長(zhǎng)一段時(shí)間 (It's impossible to judge at this distance of time. 經(jīng)過(guò)這樣長(zhǎng)一段時(shí)間以后,再想作出判斷是不可能的了)。 be a great distance away 離得很遠(yuǎn)。 be out of (striking) distance (from...) 太遠(yuǎn),難(打)到。 be within striking [hailing, hearing] distance (在)能打到[聽(tīng)到](的地方)。 from a distance 從遠(yuǎn)方 (It's a very beautiful house, especially from a distance. 這是一所漂亮的房子,從遠(yuǎn)處看尤其如此)。 go [last] the distance 做完,堅(jiān)持干到最后一次。 in the distance 在遠(yuǎn)處,在很遠(yuǎn)的那邊。 Keep at a distance ! 別靠近! Keep distance 留間隔。 Keep sb. at a distance 與某人保持相當(dāng)距離,敬而遠(yuǎn)之,疏遠(yuǎn)。 keep one's distance 避開(kāi),不接近 (Keep your distance from him. 你不要接近他)。 know one's distance 知分寸,守本分。 to a distance 到遠(yuǎn)方 (spread to a distance 伸展到遠(yuǎn)方)。 within ... distance 在…距離內(nèi) (within jumping distance 在跳得到的地方)。 vt. 1.隔開(kāi),把…放在一定距離之外;使顯得遙遠(yuǎn)。 2.超過(guò),趕過(guò),勝過(guò);(比賽中)把…甩在后面。 distance one's competitors (競(jìng)賽中)把對(duì)手遠(yuǎn)遠(yuǎn)地甩在后面。 I feel I'm distanced by him in every respect. 我感到自己在各方面都趕不上他了。
At present , there are all kinds of digital program exchange systems , but these devices are of the following faults : 1 relatively short propagation distance 目前,數(shù)字程控調(diào)度交換系統(tǒng)雖然品牌眾多,但都具有如下特點(diǎn): 1調(diào)度平臺(tái)發(fā)出的信號(hào)傳輸距離短。
When the experimental frequency is above the critical frequency of 0 . 5 mhz , that the measured velocities are phase velocities must demand that propagation distance in the anisotropy media is less than two times of the transducer ' s diameter 以0 . 5mhz頻率為界,大于此頻率時(shí),只要各向異性樣品的傳播距離小于換能器直徑的兩倍,測(cè)得的速度認(rèn)為是相速度。
The envelope equation of laser propagating in the plasma channel , and the general expression related the laser spot size with the propagation distance and the width of the plasma channel etc . , are derived based on the hamilton - jacobi equation and the refractive index equation 在此基礎(chǔ)上得到了激光在等離子體隧道中傳輸?shù)陌j(luò)方程以及光斑半徑與傳輸距離、隧道寬度等初始參量的關(guān)系。
The results also indicate that , in a piece of gain medium , the cutoff frequency , " the most quickly growing frequency " and the integral exponential gain are variables of the beam intensity , medium gain coefficient and propagation distance 在考慮了介質(zhì)的增益后,截止空間頻率、最快增長(zhǎng)頻率以及最大增長(zhǎng)因子不再像原始b - t理論中那樣保持不變,它成了和光強(qiáng)、介質(zhì)增益系數(shù)及傳播距離有關(guān)的一個(gè)量。
Numerical examples show that , pulse deformation and broadening , spectrum redshifting , narrowing and distortion take place with increasing diffraction angle in the near field , and the pulse form changes with propagation distance in the near field , but is preserved in the far field 數(shù)值計(jì)算例說(shuō)明在近場(chǎng)隨衍射角的增大會(huì)出現(xiàn)脈沖變形、加寬、譜紅移、變形、變窄等特性,脈沖形狀在近場(chǎng)隨傳輸距離變化而變化,但在遠(yuǎn)場(chǎng)保持不變。
Then , after computing xpd induced by rain , its forecast model at different propagation distance is found . this paper also discusses the relation of reflectivity of rain with rainfall rate , taking different polarization wave into account , and that of fog with visibility 在研究了雨、霧介電特性的基礎(chǔ)上,計(jì)算了雨的去極化分辨率,得到了不同頻率、不同傳播距離的去極化分辨率預(yù)報(bào)模型;計(jì)算了不同極化狀態(tài)的波的反射率隨降雨率的變化規(guī)律。
The main achievement of the paper is that the nnlse is simplified to a linear equation . it is found that we can controll a weak beam ' s phase to experience a very large phase shift within a rather short propagation distance by modulating the input power of a stronger soliton beam 本論文的主要貢獻(xiàn)是:把光束的傳輸方程nnlse簡(jiǎn)化成一線性形式的近似方程,發(fā)現(xiàn)可以通過(guò)調(diào)節(jié)強(qiáng)孤子光束的功率來(lái)控制另一弱光的相位并能使之在極短的傳輸距離內(nèi)產(chǎn)生大的相移。
The propagation of ultrashort laser pulse in air is analyzed with mechanics analogy by considering kerr effects and free electron defocusing . the equation describing the evolution of the laser spot is derived . it is shown that long distance focusing requires large initial beam and the propagation distance is very sensitive to the initial divergence angle of the laser beam 考慮多光子電離效應(yīng)和光學(xué)kerr效應(yīng),首次利用力學(xué)類比的方法研究了超短脈沖激光在電離氣體中的傳輸,詳細(xì)分析了傳輸距離與激光初始光斑、初始發(fā)散角以及激光功率的關(guān)系,提出了實(shí)現(xiàn)長(zhǎng)距離傳輸?shù)臈l件。
As an example , we studied the co - propagation of two soliton beams with one ' s amplitude is much stronger than another . it is then found that the weaker ( probe beam ) can experience a very large phase shift within a rather short propagation distance by modulating the input power of the stronger ( pump beam ) . chapter 3 , nnlse is simulated for two beams propagation 以振幅一強(qiáng)一弱共同傳輸?shù)墓伦庸馐鵀槔M(jìn)行了具體研究,相位分析顯示,與局域孤子相比,孤子光束在相當(dāng)短的傳輸距離之內(nèi)能產(chǎn)生大的相移,可以通過(guò)對(duì)強(qiáng)光(泵浦光)能量的調(diào)控來(lái)實(shí)現(xiàn)對(duì)弱光(信號(hào)光)的相位調(diào)制。
Abstract : based on two order approximation of the variation of refraction index produced by self - action while optical pulses are traveling in kerr - medium , the propagation equation has been solved . furthermore , the strict analytical expressions of the amplitude , width and chirp parameter of chirped gaussian pulse , relative to the propagation distance , are deduced . the solitary wave traveling conditions of fundamental mode gaussian pulse have been discussed 文摘:將光脈沖在克爾介質(zhì)中自作用產(chǎn)生的折射率變化作二階近似,求解所得到的傳播方程,得到啁啾高斯脈沖幅度,脈沖寬度和周啾參數(shù)隨傳播距離變化的嚴(yán)格解析解,討論了基模高斯脈沖孤波傳播的條件。