Alkanethiols
烷硫醇
🗣️ 情景例句
I'm leaving for Beijing on a four-day tour.
我马上要去北京旅游4天。
I haven't the slightest idea what you're talking about.
我一点也不知道你在说些什么。
The lake was not a natural one, but a man-made reservoir.
这不是一个天然湖泊，是一座人工修建的水库。