Lesson 99-100一. 单词讲解1.slip1）v.滑倒，滑了一跤slip in the mud 滑倒在辽泥泞中 slip on the stairs 从楼梯上滑倒eg.I slipped on the ice 我在冰上滑到了2）v.滑落eg.The pen slipped from my hand 钢笔从我的手中滑落。3)溜走eg.He slipped out of the room. 他偷偷的溜出房间slip away/off 不辞而别4）n.疏忽，错误A slip of the pen 笔误 a slip of tongue 口误2.fall1)v.落下，跌倒eg. She fell into the river yesterday. 她昨天掉进河里去了。Leaves fall in autumn. 秋天叶子 2）v.下降eg.The temperature w
