Fpd
[化] 火焰光度检测器
🗣️ 情景例句
What's that?
什么问题？
I subscribed to a lot of periodicals last year.
去年我订了许多期刊。
Yes, they're our new reading books. Is the box too heavy?
对，这些是我们的新教科书，这个箱子重吗？