Biochron
生物年代, 较短时期的化石, 生物时
🗣️ 情景例句
Are you in a fraternity?
你在兄弟会吗？
I asked him to fix it for me, but he wouldn't.
我请他帮我修理，但是他不肯。
There go the house lights.
剧院的灯光灭了。