在很长一段时间里，我们认为所有有牙齿的鲸鱼，包括抹香鲸和虎鲸，彼此都是密切相关的。

For a long time, we assumed that all whales that had teeth including sperm whales and killer whales were closely related to one another.

youdao

所有的学生都在一年级和二年级结束时做了牙齿 X 光检查。

All the students had their teeth X-rayed at the end of the first and second years.

youdao

基本上，你要涂掉所有牙齿，但不要涂到牙龈和嘴唇上了。

Basically you want to paint over all teeth, but leave the gums and lips untouched.

youdao