[英语课]

1.水中捞月——to fish in the air
2.苦如黄连——as bitter as wormwood
3.鸡皮疙瘩——goose-flesh
4.轻如鸿毛——as light as a feather

[英语课]

旁观者清——The onlooker sees most of the game；

艳如桃李——as red as rose

狐假虎威——ass in the lion's skin；

物以类聚——Birds of a feather flock together