村民们用石头和木材加固了村庄的围墙以防土匪袭击。

The villagers used stones and wood to ___fortify the village walls against bandit attacks.

每天锻炼可以增强你的体质和精神状态。

Daily exercise helps ___fortify your body and mind.

这瓶橙汁额外添加了维生素D来增强营养价值。

This bottle of orange juice is ___fortified with vitamin D for extra nutrition.