他们很小心的穿过繁忙的街道；仔细保持她鞋子的干净；仔细的进行研究；细心的艺术品修复者；仔细他人的权利；小心自己的行为。

• they were careful when crossing the busy street; be careful to keep her shoes clean; did very careful research; careful art restorers; careful of the rights of others; careful about one's behavior.