1. a fly in the ointment
美中不足之处;使人扫兴的(小)事
2. break a fly on the wheel
杀鸡用牛刀,浪费力气
3. die (drop) kike flies
大量地死去(或倒下)
4. Don't let flies stick to your heels.
赶快,别拖拉。
5. drink with the flies
独自一人喝酒
6. Let that fly stick in (to) the wall.
这件事(问题)不要再谈了。
7. There are no flies on him (her).
他(她)很精明能干(不会上当)。