Methylnorethindron
甲基炔诺酮
🗣️ 情景例句
She is at the top of her class.
她在班里名列前茅。
Do not sell the bear's skin before you have caught the bear.
熊未到手休卖皮（勿过早乐观）。
I'm changing my hotel. I'll drop in and leave the new address.
我就要换一家旅馆了。我会顺便再来一趟，把新地址留下来的。