得不偿失 血肉相联 打退堂鼓 鼻青眼肿 破门而入 功德无量 事半功倍 无可如何 高高在上 御驾亲征
cold feet 胆怯,#idiom625695#,信心或勇气的丧失 He planned to talk to Mary, but then he got cold feet. 他本打算去跟Mary说话,但后来临阵退缩了。 This is not the time to get cold feet. Let's do it! 