树木起天然的保护作用，遮挡了阳光的照射。

The trees form a natural protection from the sun's rays.

《牛津词典》

答案是当月亮遮挡了它时就会变黑。

It does so when the moon hides it.

youdao

当太阳、地球和月球成一直线且地球遮挡了太阳照到月球上的太阳光。

Lunar eclipses occur when the sun, Earth and moon sit in alignment and the Earth blocks sunlight from reaching the moon.

youdao

Now when Virginia Woolf writes that Milton's bogey has shut out the view of his female readers, she seems to be suggesting that the specter of Milton blinds women to the things that they should be seeing, the most important truths out there in the world.

当佛吉尼亚·伍尔夫写道弥尔顿的惑众谣言遮挡了,她的女性读者的目光时，她似乎是在说,弥尔顿的幽灵让女性对她们应该看到的,东西视而不见，这些东西正是世间最重要的真理。

耶鲁公开课 - 弥尔顿课程节选