Metaacetaldehyde
三聚乙醛
??? 情景例句
He pulled him out of the water.
是他把你孩子從水 拉上來的。
A good horse oft needs a good spur.
好馬常需好靴刺。
These days we use a thermos , said Li Lei.
“如今用的是熱水瓶了，”李磊說。