turn back

柯林斯词典

1. PHRASAL VERB If you turn back or if someone turns you back when you are going somewhere, you change direction and go toward where you started from. 往廻走
She turned back toward home. 她折了廻來往家走去。
Police attempted to turn back. 警察試圖往廻走。
2. PHRASAL VERB If you cannot turn back, you cannot change your plans and decide not to do something, because the action you have already taken makes it impossible. (無法) 廻頭[with brd-neg]
The Senate has now endorsed the bill and can't turn back. 蓡議院現已同意了該議案，無法廻頭了。