cloud n. 1.云。 2.云狀塵埃、煙(等);(鳥、蟲、飛機(jī)等的)大群,大隊。 3.(水晶等的)霧斑,(鏡子等上的)云斑。 4.(顯出疑惑、不滿、悲哀等的)陰郁臉色;遮暗物,陰影。 5.(編結(jié)的質(zhì)地輕柔的)女圍巾。 6.(名譽等的)污點。 a cloud of steam 霧氣。 a cloud of dust 一團(tuán)塵霧。 a cloud of birds (像云一樣的)一大群鳥。 a cloud of arrows 一陣稠密的亂箭。 a cloud of words 曖昧話。 be lost in a cloud 煙消云散。 be lost in the cloud 隱入云中。 blow a cloud 〔俚語〕抽煙,吞云吐霧。 cast a cloud (up)on 在…上投下一層暗影。 Every cloud has a silver lining. 烏云朵朵襯白底,黑夜漫漫有盡頭;任何困難情況都有可盼的希望。 drop from the cloud 從天而降。 (lose oneself) in the clouds 1. 在云層中;[喻]虛無飄渺。 2. (人)空想,呆想,茫然;(事情)不落實,不現(xiàn)實。 kick the clouds 〔俚語〕被絞死。 on a cloud〔俚語〕滿心歡喜,興高采烈。 under a cloud 不得意,失寵,受嫌疑,遭白眼,處困境。 under cloud of night 趁黑。 wait till the clouds roll by 等烏云散開,等時機(jī)到來。 vt. 1.使烏云密布,使變黑暗。 2.在(心)上投下苦惱的[憂愁的]暗影,使心情黯然。 3.破壞(名譽),損傷(友誼)。 face clouded with anger 因為生氣而面色陰沉。 vi. 1.云層密布,變黑暗;(鏡面等)布滿云斑。 2.(心)變憂郁,變黯然(over, up) (臉色)陰沉下來。 adj. -less 無云的,晴朗的。 n. -let 微云,朵云,片云。
The electron clouds are clearly visible as blurs surrounding the invisible nuclei . 電子云就象環(huán)繞著看不見的核的一片云霧。
Apart from x - rays which are emitted by excitation of electron clouds , most of the ionizing radiation come from the 射線是由受激發(fā)的電子云射出,而其他的電離輻射主要是由
Rays are emitted from the nuclei of unstable atoms during radioactive decay , while x - rays are from the electron cloud as the result of electron excitation 射線是由不穩(wěn)定原子核射出的,而射線則由受激發(fā)的電子云射出。
Rays are emitted from the nuclei of unstable atoms during radioactive decay , while x - rays are from the electron cloud as the result of electron excitation 射線是由不穩(wěn)定原子核射出的,而射線則由受激發(fā)的電子云射出。
This bond is a weak electrostatic force of attraction between the pro ton of a hydrogen atom and the electron cloud of a neighboring electro - negative atom 氫鍵是氫原子核及其相鄰的負(fù)電荷原子的電子云之間的一種微弱的靜電吸引力。
To give readers an example : the electron cloud of a hydrogen atom on earth is essentially distributed spherically around the hydrogen nucleus . but interesting things occur when we place a hydrogen atom in a strong magnetic field of 8 x 10 舉例說,在地球上,氫原子的電子云呈球狀分布在氫的核心內(nèi)但當(dāng)你把一顆氫原子放在8x10