Percentage of the sky covered by any type of cloud 天空被云层遮盖的百分比。
2.
It is so far that we can ' t see that piece of the sky covered by the artillery fire and smoke 遥远得让我们看不清空中已被炮火和烟雾所覆盖。
3.
The international unit for reporting cloud amount . cloud amount is assessed in total which is the estimated total apparent area of the sky covered with cloud 把天空分为八份， 1份即是八份之一的天空被云遮蔽， 2份即是八份之二的天空被云遮蔽，如此类推。
4.
The international unit for reporting cloud amount . cloud amount is assessed in total which is the estimated total apparent area of the sky covered with cloud 把天空分为八份， 1份即是八份之一的天空被云遮蔽， 2份即是八份之二的天空被云遮蔽，如此类推。
