Vinylmethylketone
丁烯酮
🗣️ 情景例句
It sets the tone for the whole show.
它决定了整个展览的气氛。
Don't you think we should add a sentence here like this?
难道你不觉得我们应该在这儿加上一句话？
The slope averages about 1 in 30, but contains steep,
坡度平均约为1/30，但其中包括陡峭的，