Pidemiologist
[医] 流行病学家
🗣️ 情景例句
May I help you, sir?
需要我帮忙吗，先生？
How many cups are you going to order?
你要订几杯？
We need our order number on the outside of each box.
我们需要每只箱子的外观都打上订购号码。