cloud

云；阴云；云状物；一大群；黑斑英释nna white or grey mass in the sky that forms from very small drops of water

使混乱；以云遮敝；使忧郁；玷污vv

1 in the clouds,心不在焉；在云层中

2 cloud computing,云计算

3 under a cloud,失宠；不高兴；受嫌疑

4 dark cloud,乌云；黑云；暗云

5 cloud point,[化]浊点

6 cloud cover,云量

7 on a cloud,[美国俚语]忘乎所以；高兴得不得了；恍惚

8 cloud nine,n. [俚]九重天（想象中的天堂）；[俚]极乐心境；[俚]狂喜状态

9 molecular cloud,分子云

10 gas cloud,气体云；空气层；烟气层；毒云

11 a cloud of dust,一阵尘土

12 mushroom cloud,蘑菇云（热核爆炸后升起的）

13 cloud formation,云之形成

14 dust cloud,[天文]尘埃云；尘云；尘雾

15 magellanic cloud,麦哲伦星云

16 cloud layer,云层

17 convective cloud,对流云；对疗

18 electron cloud,电子云

19 rain cloud,n. 雨云

20 storm cloud,暴风云；动乱的征兆

1 Fears of renewed terrorist attacks cast a cloud over the event (= spoilt the happy situation ) ..对恐怖分子再次发动袭击的担心给这次活动蒙上了一层阴影。