Tetrasaccharide
四糖
🗣️ 情景例句
Andy, oh my God. I can't believe it. What are you doing here? I thought you're in Singapore.
安迪，我的天，竟然在这里遇见你。你在这里干什么？我以为你在新加坡。
What is he doing today?
今天他在做些什么？
He always talks big.
他总是吹牛。