Chelen
[医] 氯乙烷
🗣️ 情景例句
This is Nat Baker,
这是Nat Baker
Many happy returns of the day.
祝您长寿。
suggested an idea on which he had been working for many years to the British Government and industrial circles.
他向英国政府和工业界提出了他研究多年的一项计划。