一步也不退让 stand one's ground
只能进不能退的地步 point of no return
决不退让一步 never yield an inch
不退步
Stand fast
以上为机器翻译结果，长、整句建议使用 人工翻译 。
但是她绝不退步—不管他怎么欺负兄弟姐妹，吼叫或撞头，他的妈妈都不会让他超出一定的限度。
But she never caved — if he hit a sibling, no matter how much he screamed or banged his head, his mother would not let him out of time-out.
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