重點講解：
1. encourage sb. to do sth.
鼓勵；勸說某人做某事；
eg. The idea is to encourage people to get to know their neighbours.
其目的是促使人們結識鄰居。
eg. Her success encouraged me to try the same thing.
她的成功鼓勵我嘗試做同樣的事。
2. by accident
意外；偶然；
eg. This doesn't happen by accident; it happens by design.
但它不是偶然發生的，是精心設計才得以完成的。
eg. She knocked the vase off by accident.
她不小心把花瓶打掉了。
3. choose to do sth.
甘愿；決定做某事；
eg. The place we choose to live affects every aspect of our being.
我們所選的居住地影響了我們生存的方方面面。
eg. Many students choose to continue their study because of the tightmarket.
因為工作難找，許多學生選擇繼續學習。