Ethinylation
乙炔化
🗣️ 情景例句
I care about new fixtures in the hallways--
我关心走廊的新灯具，
Would you mind handing me that cup?
请把那个杯子递给我，好吗？
A long time ago, one of his ancestors who lived in Africa went into the forest to cut down a tree to make a drum.
很久以前，他那生活在非洲的祖先中有一人走进森林去砍树来做鼓。