例句與造句

1. major meteor stream
   主要流星群
2. most of the meteoroids of the leonid meteor stream concentrate in an elongated thin ribbon-like region . the stream orbits around the sun in an elliptical orbit with a period of about 33 years
   獅子座流星群聚集于一條狹長的區(qū)域內(nèi)，以極為橢圓形的軌道環(huán)繞太陽運(yùn)行，周期約為
3. the duration of twilight, details of equinoxes, solstices, eclipses, information on calendar, observation of meteor streams and planetary phenomena as well as climatological " normals " of hong kong and some major cities for each month of the year are also given in this publication
   此外，年歷內(nèi)亦列出曙暮光的持續(xù)時(shí)間，以及春分、秋分、夏至、冬至、日食、月食、歷法、流星群及行星觀測等詳盡資料。
4. the numerical computation for the secular variable of the semi-major axis, solar distance at perihelion, orbital periods and longitude of perihelion has been made for fifteen meteor streams by using the solution of gylden-meshcherckii equations
   利用g-m型變質(zhì)量天體軌道根數(shù)變化方程的一階和二階解對(duì)15個(gè)流星群軌道半長軸、近日點(diǎn)距離、軌道周期和近日點(diǎn)經(jīng)度因太陽質(zhì)量損失造成的每世紀(jì)的長期改變效應(yīng)做了數(shù)值計(jì)算，并得出計(jì)算結(jié)果。
5. the results show that the solar mass-loss extends the semi-major axis, the distance at perihelion and orbital periods of the meteor streams, especially, the extensive influence on the semi-major axis is not overlooked, but this influence on other orbital elements may be neglected
   其計(jì)算結(jié)果表明，太陽質(zhì)量損失使流星群軌道半長軸每世紀(jì)的改變效應(yīng)較明顯，它們同太陽距離的擴(kuò)大影響值得關(guān)注，但對(duì)軌道周期的拉長每世紀(jì)的影響甚小，對(duì)近日點(diǎn)經(jīng)度只有量級(jí)變化小到可以略而不計(jì)。
6. It's difficult to find meteor streams in a sentence. 用meteor streams造句挺難的