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.