1. Don't trust a goat with the kitchen-garden or a wolf with a sheepfold.
翻译：不能请羊管菜园，不能请狼管羊圈。
2. Who keeps company with wolves, will learn to howl.
和狼在一起，就会学狼叫。
3. Man is a wolf to man.
人对人是狼。（人心狠，人吃人）
4. A growing youth has a wolf in his belly.