重點講解：
1. of all
（用于強調first， last或最高級形容詞或副詞）最，最為；
eg. Now she faces her toughest task of all.
現在她面臨著最艱巨的任務。
eg. They are the most dependable of all.
他們是最為可靠的。
2. ascribe...to
把…歸因于；把…歸咎于；
eg. An autopsy eventually ascribed the baby's death to sudden infant death syndrome.
尸檢最終認定孩子死于嬰兒猝死綜合征。
eg. He ascribes his success to good luck.
他把他的成功歸功于幸運。
3. owe...to
應把…歸因（于）；應把…歸功（于）；
eg. I always suspected she owed her first job to her friendship with Roger.
我一直懷疑她仗著自己是羅杰的朋友才得到第一份工作。
eg. He owed his survival to his strength as a swimmer.
他是因為水性好才幸免于難的。
4. at work
起作用；發揮效用；
eg. The report suggested that the same trend was at work in politics.
這份報告表明，同一趨勢也在影響著政治。
eg. It is important to understand the powerful economic and social forces at work behind our own actions.
重要的是，要理解在我們自身行動背后起作用的強大的經濟和社會力量。
5. because of
因為；由于；
eg. Many families break up because of a lack of money.
許多家庭由于缺錢而破裂。
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。