To feed the world, we must first understand the soil beneath our feet.
入住酒店房间时,先查看紧急出口。这只需要花一分钟时间。
I have nothing to offer but blood, toil, tears, and, sweat.
电子并非一个简单不可分割的实体,而是一个复杂系统,其行为只能通过量子力学定律来理解。