胃黏膜分泌的粘蛋白有助于保护胃壁免受胃酸侵蚀。

The stomach lining secretes ___mucin to help protect against gastric acid.

唾液中的粘蛋白帮助食物更容易吞咽。

___Mucin in saliva makes food easier to swallow.

这款面霜添加了黏蛋白，能有效锁住水分。

This facial cream contains ___mucin to help lock in moisture.