Salitannol
水杨酸单宁酸缩合产物
🗣️ 情景例句
I had a busy day. I'm done.
我今天很忙，现在精疲力尽。
The doctor is afraid there is no hope for him.
医生担忧他已经无望了。
The settlers built railways across the plains and began to hunt even more bison.
殖民者在平原上修起了铁路，于是开始猎取更多的野牛。