“Sink your teeth into” = “咬牙切齿”？

<p style="color:#333333;font-weight:normal;font-size:16px;line-height:30px;font-family:Helvetica,Arial,sans-serif;hyphens:auto;text-align:justify;" data-flag="normal">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？</p><span><br /></span><hr style="border:0px;margin:20px 0px;background:#ddd;display:inline-block;width:100%;border-style:solid;height:1px;" /><br /><br /><p style="color:#333333;font-weight:normal;font-size:16px;line-height:30px;font-family:Helvetica,Arial,sans-serif;hyphens:auto;text-align:justify;" data-flag="normal">C: Hi guys. I’m Chris.<br />&nbsp;<br />J: And I’m Joy. Today we are gonna talk about the idiom:&nbsp;<span><strong style="color:#FC5832;word-break:break-all;font-family:Helvetica,Arial,sans-serif;font-weight: normal;">sink your teeth into</strong></span>.&nbsp;It&nbsp;means to do something that needs a lot of energy and enthusiasm. You can use it like this: <br /><strong style="color:#FC5832;word-break:break-...