British soldiers are working to fortify the airbase.英国士兵正在努力修筑工事以加强空军基地的防御。

Would you like some tea to fortify yourself before setting off?你出发前要不要喝点茶提提神？

The volunteers were fortified by their patriotic belief.志愿者们因其爱国信念而变得坚强。

wine fortified with brandy加了白兰地酒后度数增强的葡萄酒

It has also been fortified with vitamin C.它还加了维生素Ｃ, 提高了营养价值。