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

巨大的外行星的引力护盾虽然效率很高，但偶尔也会无法保护地球。

youdao

What's particularly interesting about these volcanoes is that most of the volcanoes here on Earth are not shield volcanoes.

十分有趣的是地球上的大多数火山都不是盾状火山。

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

This could be a serious problem. The shield protected the spacecraft from burning up from the extreme heat of re-entering the Earth's atmosphere.

VOA: special.2009.06.17

Numerous helicopter companies (most based in Lihu'e) offer up-in-the-air jaunts over waterfall-striped Mt Wai'ale'ale, the island's central shield volcano and one of the wettest spots on Earth, and the sheer-hewn sea cliffs of the Na Pali coast, accessible otherwise only by ocean kayak.

BBC: Hawaii for beach haters

Top of the list is a solar shade, a gigantic umbrella in space that would shield the Earth from the sun's rays.

ECONOMIST: Geo-engineering