noun · a gate or door constructed with bars or a grating

牧场主锁上了栅门，以防牛群跑出去。

noun · a basic component of an electronic circuit that performs logical operations

工程师正在研究该半导体中的栅门结构。

noun · a mechanical gate with revolving arms designed to allow one person through at a time

进站前，乘客需要先刷卡通过栅门。