Haptene
[医] 半抗原, 不全抗原
🗣️ 情景例句
It's no use crying over spilt milk. What's done cannot be undone.
覆水难收。
The old lady takes delight in visits from her grandchildren.
那个老妇人以孙辈门看她来为乐。
Education, with its cycles of instruction so carefully worked out,
教育，以其教学周期如此精心地安排，