Why do chemical compounds behave as they do? 化合物为什么会有其自身这些特性?
Water is a compound of hydrogen and oxygen. 水是氢和氧的化合物。
John and Steve working together? That's a lethal compound. 约翰和史蒂夫一起工作?那是个很危险的组合。
present tense | |
I/you/we/they | compound |
he/she/it | compounds |
present participle | compounding |
past tense | compounded |
past participle | compounded |
Their problems are compounded by the fact that Mary's just lost her job. 他们的困难因玛丽刚刚失业而变得更加严重了。
a compound leaf 复叶
noun¹
noun²
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