只要你没扭伤脚踝，我就安心了。
ankle /???kl/ n. 脚踝，脚脖子
◆ sprain one's ankle 扭伤脚踝
◆ at ease 安适，自在
■ so long as 常可与 as long as 互换使用，意为“只要”。
（让人）换鞋跟 have the heel replaced
A：Excuse me, I want to have the heel replaced on my shoe. Could you tell me where I can find a shoemaker's nearby?
打扰一下，我想换一下鞋跟。您能告诉我这附近哪儿有修鞋店吗？
B：You can ask the policeman over there. I'm also a stranger here.