重点讲解：
1. rely on 依赖；依靠；
The industry relies on the price of raw materials remaining low.
这一产业靠的是原料便宜，不涨价q|M*86^6f%_HC4jV_r。
2. stem from 起源于；来自；由…造成；
All my problems stem from drink.
我所有的问题都源于酗酒^&itOVl&fGp,&。
3. bump into 偶然遇见；意外碰到；
I happened to bump into Mervyn Johns in the hallway.
我在走廊里意外碰见了默文·约翰斯LUsQGy^qrs#u。
4. be scared to do sth. 惊恐的；恐惧的；害怕的；
I had white rugs on the floor, but people were scared to tread on them in case they marked.
我在地板上铺了白色小地毯，但大家都不敢往上踩，以免在上面留下脚印Fn+@9Z2CuWYg_kF]。