词汇突破：
1. clearly 显然；清楚地；由形容词clear变化而来；2. pass 经过；3. railway 铁路；4. wave 挥手；5. complete 完全的，彻底的；6. stranger 陌生人；7. cheer up 使……高兴，使……振作；8. rush 急速行进，冲，奔；9. make it one’s business to do sth. 把做某事当成自己的职责；拆分句子:
Clearly they knew at what time the train passed their homes and they made it their business to stand along the railway, wave(挥手) to complete strangers and cheer them up as they rushed towards Penang.
本句话拆分后：
1. Clearly they knew…；2. at what time the train passed their homes；at what time=when；3. and they made it their business to stand along the railway；4. wave(挥手) to complete strangers;5. and cheer them up;6. as they rushed towards Penang;参考译文：
他们显然知道火车什么时候途径他们的家，他们把这些事情当成自己的职责：沿着铁路站立、向完全陌生的人挥手、让他们高兴，当这些陌生人匆忙赶往槟城的时候。声明：来源于网络！
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