Fasteners
n. 紧固件( fastener的复数形式 ); 结扎者; 钮扣; 拉链
🗣️ 情景例句
Yeah, we caught lots of them. Look!
当然 我们抓到不少鱼。看！
He who risks nothing, gains nothing.
不入虎穴，焉得虎子。
The further off this solid obstruction, the longer time will elapse for the return of the echo.
固体障碍物越远。回声返回所用时间就越长。