Hexylacetylene
[化]己基乙炔
🗣️ 情景例句
Have a nice flight.
祝您一路顺风。
He who fears to suffer, suffers from fear.
怕吃苦头的反因怕而吃苦头。
He collected tetters and made copies of people's diaries.
他收集到一些信件，复印了一些人的日记。