Bipennate
[医] 二回羽状的(叶脉)
🗣️ 情景例句
Five.
5号。
To enter outer space
飞出大气层，进入外太空
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。