Section Ⅱ　Welcome to the unit & Reading

-Language points

　　 beneficial adj.有益的，有用的

　　(教材P18)Both of these medicines have saved millions of people's lives and have proved beneficial to mankind since they were invented.

　　自从发明这两种药物以来，它们已挽救了数百万人的生命并被证实对人类有益。

　　(1)be beneficial to　　 对......有益

　　(2)benefit n. 利益，好处

　　　　　　vi. 有利于，受益

　　be of benefit to(＝be beneficial to)

　　 对......有益

　　for sb.'s benefit(＝for the benefit of sb.)

　　 为了某人的利益；为帮助某人

　　benefit from/by 从......中得益

　　①Who exactly stands to benefit from these changes?

　　到底是谁会从这些变革中获益？

　　②The new regulations will be of benefit to/be beneficial to everyone concerned.

　　新规章将使所有有关人员受益。

③Cycling is highly beneficial(benefit) to health and environment.骑自行车对健康和环境都有益。