复合用英语怎么说筒说

复合用英语叫做 "compound"，来源于拉丁语 "componere"，意为把不同的事物合并在一起。
例句：
Water is a compound made up of hydrogen and oxygen.
"水是由氢和氧组成的化合物"
The compound on the left is more stable than the one on the right.
"左边的化合物比右边的稳定"
The new medication is a compound of several different drugs.
"新药是几种不同药物的复合物"
这个词不是 筒 的意思, 筒 的英文是 cylinder。