Acetylidene
異乙炔
??? 情景例句
I can assure you that as long as you stay at home, you're safe.
我可向你保證，只要你呆在家里就會很安全。
I've never read a more stirring story.
我從來沒讀比這更激動人心的故事。
He noticed that the straight part of the dance was different in the afternoon from what it had been in the morning.
他注意到下午舞蹈的直線部分與上午的不一樣。