When the wire is longer than 600 meters, you must shield them or set metal pipeline.

导线长在600米以上时，应采用屏蔽或金属管道布设。

youdao

Third, the gravitational shield of the giant outer planets, while highly efficient, must occasionally fail to protect Earth.

第三，巨大的外行星的引力屏障虽然非常有效，但偶尔也会无法保护地球。

youdao

He must pile more sand on top as a shield.

他必须在顶上多加些沙土作为防御物。

youdao

This rivets marketers, but riles privacy advocates, who argue Yahoo and other Web sites must do more to shield their customers from unauthorized and overly intrusive tracking techniques.

FORBES: The Killer Ad Machine

Judge Ito did not immediately decide if her information is so crucial to Simpson's defense that she must divulge it despite the shield.

CNN: O.J. Simpson trial: Debate over 'Fuhrman Tapes' heats up

To protect electronics infrastructure, entire systems must be encased in a metallic shield to prevent any external electromagnetic pulse from entering.

CENTERFORSECURITYPOLICY: Old threat with a new face