词汇讲解：
1. crack v. (使)发出爆裂声
例句：He cracked the joints of his fingers.
他把手指关节弄得劈啪作响。
2. can n. 一罐
例句：Add three cans of water to make the orange juice.
加进三罐水调橘子汁。
3. ingredient n. (混合物的)组成部分; 配料
例句：What are the ingredients of the cake?
这蛋糕是用哪些原料做成的?
4. ban vt. 取缔, 查封, 禁止
例句：The new military government has banned strikes and demonstrations.
新的军人政府禁止罢工和示威活动。
5. dye v. 给…上色; 着色 
