eyelid

n. 眼皮,眼睑

The soldiers are still holding the fort, but they're hanging on by their eyelids.

士兵们仍然固守城堡，但他们已陷于险境。

We use our eyelids to blink so as to clean our eyes.

我们利用眼睑眨眼来清洁眼睛。