We talked about " watch your step" when you have to be careful where you are walking; now Brett says, " Watch your head, " meaning look above to make sure you're not going to hit your head on something.
当你路时必须小心时, 我们谈到“小心你的脚步” ;现在布雷特说, “小心你的头” ,意思是看上面, 以确保你的头不会被什么东西撞到。