Trisomy 21
[医]21三体
🧩 词语组成解析
n. [生]三(染色)体性,三(染色)体细胞
twenty-one; [电影]决胜21点
🗣️ 情景例句
Does this car have good fuel economy?
这种车省油吗？
I've studied the reports of past meetings.
我学习了以往的会议记录。
No, it isn't.
不，不是！