重點講解：
1. on one's own
單獨地；獨自地；
eg. I need some time on my own.
我需要獨處一段時間。
eg. For many old people living on their own the telephone is their lifeline to the outside world.
對許多獨居的老年人來講，電話是他們與外界聯系的生命線。
2. push through
通過；穿過；
eg. The doctor pushed through the crowd to get to the injured man.
醫生擠過人群來到受傷的男子面前。
eg. The hole is too small; I cannot push my arm through.
這個洞太小了，我的胳膊伸不過去。
3. because of
因為；由于；
eg. Many beautiful fish are fast disappearing because of the severe pollution.
因為污染嚴重，許多美麗的魚類正在面臨絕種。
eg. He got angry with me because of my remark.
他由于我講的話而生我的氣。