Unit 4 words1. protection n. U保护，防御 protection n.protect v.protective adj. protect.against/from. 保护免受的伤害 You should turn to your teacher for protection if you are in danger. 如果你处于危险中，你应该向你的老师 寻求保护。【知识拓展】 under the protection of 在的保护下 give / provide protection 提供保护 He is wearing sunglasses to protect his eyes from the strong sunlight. 他戴着太阳眼镜，以保护他的眼睛免 受强光的照射。2.decrease (1) vi.& vt.减少；(使)变小；或变少 Car sales are decreasing. 汽车销量正在减少。 The number of traffic accidents has decreased. 交通事故的数量已经减少了。 (2) n.
