Protochordate
n. [动]原索动物
🗣️ 情景例句
She is giving me piano lessons in exchange for her English classes.
我教她英语，她教我弹钢琴。
He is the wise man who is the honest man.
诚实的人就是聪明的人。
He did a lot of research and travelled around the USA looking for information about his ancestors.
他做了大量的研究，在美国跑了许多地方，了解有关祖先的情况。