1. We're not a fly-by-night operator. 我们不做一锤子买卖。2. Red flag. 危险! 3. He runs after anyone in skirts. 他玩弄女性。4. How could you lay it at my door? 你怎么能说是我的责任呢?5. My heart was in my mouth. 我的心都提到嗓子眼了。
