在英语中，”sink”是下沉的意思，那么把牙“下沉”到某件东西里，其实是相当于用牙狠狠的咬上去，但是这只是字面的意思，我们说过很多时候不能用中文直译英语中的意思，那这个习语到底是想表达什么意思呢？ C: Hi guys. I’m Chris. J: And I’m Joy. Today we are gonna talk about the idiom: sink your teeth into. It means to do something that needs a lot of energy and enthusiasm. You can use it like this: I want to sink my teeth into this. / She really sank her teeth into it. / They are going to sink their teeth into it. C: Well, the literal meaning of this idiom is to bite something. So imagine someone slowly biting into a burger with his teeth. We can call that: he’s sinking his teeth into that burger. This idiom was first used to describe animals that bite deeply and vigorously into food. So maybe recently you just bought a book that is talking about public speaking. You can tell your friend that it’s a great book to sink your teeth into. Or you have put on a little weight and deci...