let in

基本解释

The coating blocks heat from the sun while letting in light.
這種金屬塗層能夠阻止熱能進入室內，同時又讓光線進入室內。
Despite letting in some aid, and some foreign relief workers, Burma's government continues to restrict the amount of help that is reaching the victims.
雖然緬甸政府已經允許一部分救援物資和一些外國救援人員進入緬甸，但是它還在限制能夠到達災民手中的援助。
But a plaintive note explaining the closure—thieves have stripped the roof of its copper cladding, letting in rain on the books below—hints at profound changes to the global economy.
但一張哀傷的便牋不僅解釋了其閉館的原因——小媮們把屋頂外層銅質的包層給剝去了，任由雨滴落在下麪的書上——它也暗示著全球經濟的深刻變化。

In everyday speech, holding your cards close to your vest means not letting other know what you are doing or thinking.
It's an opportunity to deal with those perhaps in a more constructive way, than letting the feeling spiral.
也許可以借這個機會用更有建設性,的方法應對，而不是使負麪情緒惡化。
普林斯頓公開課 - 人性課程節選
because they're fighting against letting immigrants coming in and attack us and terrorism.
因爲他們反對移民者入境，接著襲擊我們，引發恐怖主義。
英國的極右政黨 - SpeakingMax英語口語達人

We can do this by opening the borders and letting in more high-skilled workers.
FORBES: How Risky Is The U.S. Level Debt?

If an object lets in something such as air, light, or water, it allows air, light, or water to get into it, for example, because the object has a hole in it. ( )