重點講解:
1. at risk 處境危險;有風險的;在危險;
As with all diseases, certain groups will be more at risk than others.
所有的疾病都是如此,一些人比另一些人更容易受到威脅 。
2. be sure of 確信的;確知的;
I hope you are sure of your facts.
我希望你能肯定你說的都是事實 。
3. object to 不喜歡;不贊成;反對;
Many local people object to the building of the new airport.
許多當地的居民反對興建新機場 。
4. no longer 不再;已不;
Food shortages are no longer a problem.
食物短缺不再是個問題 。