这屋顶结构不牢固。

The roof is structurally unsound.

《牛津词典》

因为知识不牢固而导致了一个小爆炸。

I made a small explosion by not mastering the knowledge.

youdao

明显的是新生儿不应该睡在不牢固的床上。

Apparently newborns should not sleep with anything loose in the crib.

youdao

但是它的牙齿不牢固了。

But its teeth are weak.

youdao

这屋顶(结构)不牢固。

The house roof was (structurally) unsound.

youdao

这座房子的地基不牢固。

The grounds and buildings of a military base.

youdao

如果几年来，婚姻关系不牢固，你将知道谁可能被取代。

A couple of bad years in a relationship, and you-know-who might get replaced!

youdao

切袋不粘刀，封切口整齐美观又牢固、袋子切边光滑。

Easy operating, Pleasant cutting and sealing, with high firmness and slice the side smooth.

youdao

切袋不粘刀，封切口整齐美观又牢固、袋子切边光滑。

Easy operating, Pleasant cutting and sealing, with high firmness and slice the side smooth.

youdao