Altocumulus clouds, embedded in the altostratus cloud, can be seen at left.

在照片左边，可以看到一部积云嵌在层云中。

Clouds are formations of condensed water vapour.

云是由凝聚水蒸气构。

The clouds have blocked the sun out.

云彩遮住了太阳。

A crescent moon peeped out from behind the clouds.

一弯新月从云中出现。

The artificial rainmaking ( cloud seeding ) doesn't help much.

人造（云种散播）发挥什麽多大作用。

Now scientists have learned to make rain by salting clouds with certain chemicals.

如今, 科学家已经掌握了把某些化学物质撒在云层上以人工造方法。

Clouds usually precipitate as rain or snow.

云常会凝或雪。

The moon peeped out from behind the clouds.

月亮从云层中隐约出现。

I peep out the porthole and see a sea of clouds.

我从飞机舷窗向外张望，看到一片云海。

The moon finally peeped out from behind the clouds.

月亮终于从云层后面露了出来。

The sun was peering through the clouds.

太阳从云中隐约出现。

The sun peered through a vast cloud.

太阳从大块云朵中隐隐出现。

The peak towers up into the clouds.

那座山峰耸入云。

You can enjoy the extraordinary sight unbroken cloud plains that stretch out before you.

你可以欣赏展现于面前一望无边奇特云海。

The moon was obscured by dark clouds.

月亮被乌云遮住了。

A dark cloud loomed up over the horizon.

一片乌云突然出现在天际。

He navigated the plane through the clouds.

他驾驶飞机穿越云层。

He navigated the plane through the low cloud.

他驾驶飞机穿过低低云层。

Dark clouds massed, and we expected rain.

乌云密集, 我们企盼下。

The glider was soon lost sight of in the clouds.

滑翔机很快消失在云层里。