Propanal
丙醛
🗣️ 情景例句
Please do the work at your own convenience.
请在方便时把这事做一做。
In general,my reaction is favorable.
总的来说,我的反应是有利的。
This immense chasm has been formed by an underground stream which has tunneled a course through a flaw in the rocks.
这个深邃的洞穴是由一条地下暗泉冲刷岩石中的缝隙并使之慢慢变大而形成的。