Rns
[医][=reference normal serum]参考正常血清
🗣️ 情景例句
How much paint, how many hours of work ...
多少油漆， 多少小时的工作量……
Today is May 21st.
今天是五月二十一号。
We could guarantee delivery better if you would take it now.
如果现在交货我们较能保证如期交到。