The pilot was given clearance to land by air traffic control.

飞行员得到空中交通管制站发出的着陆许可。

《牛津词典》

They have to wait for clearance from air traffic control.

他们必须等待空中交通管制队下达的起降许可令。

《柯林斯英汉双解大词典》

A sensor automatically adjusts supply air to maintain consistent web-to-surface clearance.

传感器可自动调节补充空气以使卷筒纸到表面之间的间隙保持一致。

youdao

The support troops perform a variety of functions such as mine clearance, equipment servicing, construction,air support, medical services and many others.

VOA: standard.2009.10.13

Russian officials say they gave the go-ahead to let the plane through despite its improper clearance but the flight crew says Russian air-traffic controllers reportedly turned them back.

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And you don't need a license, you don't need right-of-way clearance -- you just shoot through the air.

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Shortly after the restart, Hanlon fired a low ball towards the St Johnstone goal, but Enckelman had it covered, then Sodje delivered a cross to Stevenson who could only take a fresh-air swipe at the ball and Alan Maybury made the clearance.

BBC: Liam Craig