Hydroxyethylation
羟乙基化作用
🗣️ 情景例句
10 percent down and the balance at the time of shipment?
百分之十付现款，余额在装运时付清吗？
What's bothering you?
什么在困扰你？
It was noticed that there were no signs or warnings on the supply lines that ran round the port.
人们这才注意到，铺设在码头周围的供应管道上没有贴标签或告示。