The inner overhead covering of a room, usually made of laths and plaster.

天花板；房间顶棚(常以条板或灰泥搭建)。

Upper limit.

上限。

Highest sale price permitted.

最高限制价格。

Maximum altitude to which an airplane can ascend.

【空】(飞机的)上升限度。

Upper limit of visibility at a given time or place.

最高能见度。

The height above the ground of the base of the lowest layer of clouds when over half of the sky is obscured.

云幕高度。