eyelid

Compared meaning: the skin that covers and closes the eye (noun).

比较义项：眼睑（名词）。

• lid

  Rarely used alone for the eyelid; almost always means the cover of a container. As 'eyelid' it sounds informal, slightly old-fashioned, and needs context to avoid confusion with a jar or box lid.

  单独使用时很少指眼睑，几乎总是指容器的盖子；作为“眼睑”的说法显得比较口语化、略显过时，需要靠上下文才能避免和罐子或盒子的盖子混淆。

  His lid drooped shut as exhaustion finally caught up with him.

  疲惫终于袭来，他的眼睑（眼皮）慢慢垂下闭上了。

• eyelid 本词

  The standard, unambiguous word for the skin covering the eye, used in everyday and medical contexts without needing extra context to be understood.

  是指盖在眼睛上那层皮肤的标准说法，意思明确，无论在日常还是医学语境中使用都不需要额外的上下文来说明。

  The doctor gently lifted her eyelid to examine the eye underneath.

  医生轻轻掀起她的眼皮，检查下面的眼睛。

Both words can mean the skin covering the eye, but eyelid is the normal, everyday word. Lid alone usually means the cover of a container, like a jar. Using lid alone for the eye sounds informal, and needs context to avoid confusion with a jar.

两个词都指盖在眼睛上方、可以闭合眼睛的那层皮肤，但 eyelid 是最常用、最自然的日常说法；lid 单独使用一般指盖子（如罐子盖、锅盖），只有在能从上下文看出说的是眼睛部位时才会被理解为“眼睑”，否则容易让人误以为在说容器的盖子。