shutter

/ˈʃətər/

a mechanical device on a camera that opens and closes to control the time of a photographic exposure

Chinese meaning: 快门

The photographer pressed the shutter button to capture the fleeting moment.

摄影师按下快门按钮，捕捉那转瞬即逝的瞬间。

A fast shutter speed is essential for photographing moving subjects clearly.

快速快门速度对于清晰拍摄移动物体至关重要。