sag

Weight has caused the sag.

承重导致下垂。

Your skin starts to sag as you get older.

人老了，皮肤就会慢慢松弛。

The shirt´s cuffs won´t sag and lose their shape after washing.

这件衬衫的袖口洗后不会松垂变形。

A kind of tired, imploring expression masked his thin face, and there was an unyouthful sag about his shoulders.

他瘦削的脸上写满了一种疲倦与哀求的表情，而且他的双肩有些不年轻的下垂。

Sleeping on the front will help to prevent snoring, as the muscles of the throat will not sag backwards under gravity.

俯卧睡可以有助于防止打呼，因为这时候喉咙处的肌肉不会因为重力原因而下垂到后方。