Bioside
二糖苷
🗣️ 情景例句
Haven't I seen you before?
我以前没见过你吗？
What the hell are you doing?
你到底在做什么？
It doesn't matter. I like walking. Look at the sun! It's a fine day for a walk.
不要紧。我喜欢步行。瞧瞧太阳！这是步行的好天气。