Stems
n. 树管；阻挡物；茎（stem的复数）
🗣️ 情景例句
It was so nice to be out in the country.
出去置身乡下真是太好了。
Now, we're doing something new making skin strong enough that it doesn't wrinkle, become dry, or develop blemishes.
现在我们正在做一些改进，使皮质变得坚韧而不致有皱纹，变干或产生磨损。
What's it?
是什么？