1.slow down 減速,放慢速度
Slow down and walk for one minute.
最后,逐漸慢下速度,走一分鐘。
2.spring up 出現;涌現
But even as some obstacles are removed, new ones spring up.
但即使有些障礙已經被掃清,新的障礙還會涌現。
3.cool off 冷卻
I stopped to let the car cool off and to study the map.
我停下車,讓汽車發動機冷卻一下,同時查看一下地圖。