Sialoprotein
骨唾液酸糖蛋白
🗣️ 情景例句
And tell them you want to go on the tour that goes down into the canyon.
跟他们说你要参加到峡谷里去的旅游团。
I'm always disappointed when I don't get any mail.
当我收不到任何邮件时，我总是很失望。
No, we don't.
不，没有。