In order to prevent the illness from spreading, all the public service must be closed.

为了防止疾病传播，所有公共服务必须关闭。

youdao

The dam must be closed before the rainy season sets in, or all our Labour will be lost.

大坝一定要在雨季开始以前合拢，否则就会前功尽弃。

《新英汉大辞典》

All non-empty elements must be closed.

所有非空元素必须是关闭的。

youdao

"It's rather misleading and a loophole we think must be closed, " said Dr Helen Ferrier, food science adviser to the National Farmers' Union.

BBC: Last Updated: Friday, 4 March 2005, 17:15 GMT

Though that formula would not keep up 100% with rising health costs, Medicare does suffer an enormous long term financing gap that must be closed in some way.

FORBES: Gutting Medicare By Refusing To Pay The Bills

We know, for instance, that loopholes in the law's accountability system must be closed to ensure that the performance of disadvantaged children is not being hidden or ignored.

FORBES: Magazine Article