1. 挡球网：本垒到挡球网(BACKSTOP),及垒线至最近的围墙、看台或其他在界外区的阻碍设施距离应在60呎(18.288公尺)以上. 首先当本垒位置定位后,自此点以钢尺量127呎3 3/8吋(38.795公尺)距离,决定二垒的位置;再以本垒为基点朝一垒量90呎,
2. 托架：backstay 背撑 | backstop 托架 | backstroke 回程
3. 公共查询·英语单词
3. 后退定程挡块：backrest 座椅靠背 | backstop 后退定程挡块 | backup roll 支承辊
4. 挡网：backstitch 倒缝 | backstop 挡网 | backstretch 非终点直道
noun
1. a precaution in case of an emergency
e.g. he acted as a backstop in case anything went wrong
2. (baseball) a fence or screen (as behind home plate) to prevent the ball from traveling out of the playing field
3. (baseball) the person who plays the position of catcher
Synonym: catcher
verb
1. act as a backstop