protect和prevent的区别
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protect

vt.保护; 保卫

The troops were there to protect the townspeople.

部队驻扎在那里以保护市民.

关税保护

The country's car industry is so strongly protected.

该国对本国的汽车工业严加保护.

prevent

vt.预防

Vitamin C is supposed to prevent colds.

维生素C可以预防感冒.

vt.& vi.阻止

We shall come tomorrow if nothing prevents.

如没有什么阻碍的话,我们明天来.

Nobody can prevent our getting married.

谁也阻止不了我们结婚.