back stop
英
美
- back n.后面；背脊；靠背；后背；后卫vt.支持；后退adv.向后地adj.向后的；后面的；偏远的；过时的；积欠的
- stop v.停止；阻止；停留n.停止；逗留；车站
名词 backstop:
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(baseball) the person who plays the position of catcher
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(baseball) a fence or screen (as behind home plate) to prevent the ball from traveling out of the playing field
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a precaution in case of an emergency
动词 backstop:
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act as a backstop
