Acetonylidene
亚丙酮基
🗣️ 情景例句
His number is five, five, five, seven, five, three, two.
他的号码是5557532。
He that runs fastest gets the ring.
捷足先登。
The actual figure was made of copper supported by a metal framework which had been especially constructed by Eiffel.
这座雕像的主体是用铜制成的，由艾菲尔特制的金属框架支撑着。