Rns
[医][=reference normal serum]参考正常血清
🗣️ 情景例句
She's going to a fashion show here in the city tomorrow.
她将参加明天在本市举行的时装表演。
He who risks nothing, gains nothing.
不入虎穴，焉得虎子。
I'm calling to see what happened to our last order.
我打电话来是想知道上次订的货怎么样啦？