Aliphatics
脂(肪)族化合物
🗣️ 情景例句
and lays them face up on this stand.
将它们掀开放在这个架子上。
May I ask you a question?
我能问你个问题吗？
Two factors weigh heavily against the effectiveness of scientific research in industry.
两个因素严重地影响工业里科学研究的效果：