Visotest
数字式校表仪
🗣️ 情景例句
Thank you for inviting me.
谢谢你的感情邀请。
I suppose so.
我想是这样。
It was from the study of these that so much was learnt about the interior of the earth.
正是从这两种波的研究中，我们可以了解到地球内部的许多情况。