Tectorigenin
[化] 鸢尾黄素
🗣️ 情景例句
There's another advanced class today at four o'clock.
今天下午四点钟还有一次高级班。
I asked him to fix it for me, but he wouldn't.
我请他帮我修理，但是他不肯。
What do you find hardest in English?
你觉得学习英语哪方面最难？