hairpin

发夹、发簪

She pinned her hair up with a single black hairpin.

她用一支黑色发夹把头发盘了起来。

发夹弯、急转弯

The mountain road climbs through a series of tight hairpins.

这条山路沿著一连串狭窄的发夹弯往上爬。

发夹弯的、急弯的多用于名词前

The driver slowed down before the hairpin turn.

驾驶在进入发夹弯之前放慢了车速。