44. feel ill/bad 感觉病了 feel well感觉(身体)好
45. save one’s life/lives 拯救某人的生命
46. billions of…数以亿计的… thousands of…成千上万的 hundreds of….成百上千的…
47. stop/prevent sb. (from) doing sth. 阻止某人做某事
e.g. Florence Nightingale worked hard to stop/prevent soldiers (from) dying. 南丁格尔为防止士兵死去而努力工作.
