Keep down! You mustn't let anyone see you.
蹲下！一定不要让人看见你。
The computer system will be shut down over the weekend.
计算机系统周末关闭。
You must slow down or you'll make yourself ill.
你得松松劲，不然会累病的。
Let's get down to business.
咱们开始干正事吧。
Put the cases down there, please.
请把箱子搁在那边。
His success was down to being in the right place at the right time.
他的成功之处就在于把握住了时机。