The mining deformation damage law of thick sandy soil over roof is the basis of setting up the dynamic structure theory of roof.

顶板厚砂土层采动变形破坏规律是建立顶板动态结构理论的基础。

youdao

Mills have iron pillars all over the place holding up the roof.

工厂里到处都有铁柱子支撑着屋顶。

《柯林斯英汉双解大词典》

Michael was happy that he had a roof over his head when it rained.

迈克尔很高兴，因为下雨时他头上有屋顶可以挡雨。

youdao

They had plenty of food and a good roof over their heads and the river ran close to their door.

VOA: special.2009.02.28

We were on the roof of America and all we could do was yell I guess across the night, eastward over the plains where somewhere an old man with white hair was probably walking towards us with the word and would arrive any minute and make us silent.

我们在美国的最高处大声叫喊,我想整个夜晚，在东部平原,随时可能有一个白发老人,向我们走来,让我们安静。

耶鲁公开课 - 1945年后的美国小说课程节选

Water streams down the windows on the roof over every dog's room.

VOA: special.2009.12.11

"People are starting to realize that newer and bigger is not necessarily better, " he says gazing over the roof-tops.

CNN: Can Hong Kong build bigger, higher, greener?

The second pilot, unsure whether his colleagues were taking fire or experiencing mechanical problems, ditched his plan to hover over the roof.

NEWYORKER: Getting Bin Laden

The first rappel was easy, but the second involved going over a roof and traversing quite some distance to regain the anchor.

WSJ: Training for the Big Wall | By Michael J. Ybarra