However, time can be the enemy of love.

然而，时间可能是爱情的敌人。

youdao

Many have said that, time is the biggest enemy of marriage instead of the illegal love affairs.

有很多人说，婚姻最大的敌人不是外遇而是时间，因为时间能让人平淡。

youdao

We repelled the enemy from the shores after a long hard struggle.

经过长时间的艰苦战斗，我们将敌人从海岸击退。

youdao

Then it lands on your foot, because assuming the cannon is at zero height, the cannonball certainly comes out towards the enemy, but has no time of flight.

然后它就会落在你的脚边,因为假设大炮的高度为 0,炮弹笔直地出膛打向敌人,却没有时间飞行

耶鲁公开课 - 基础物理课程节选