Hitab
噪声和背景信号的测定靶
🗣️ 情景例句
It's small,
它小小的，
What's your favorite color?
你最喜欢的颜色是什么？
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。