The kinds of trade 主语
that nations engage in 是 that 引导的定语从句,that在从句中作宾语,故可以省略
are various 系表结构
句子主干就是 The kinds of trade are various 贸易类型是多种多样的
The kinds of trade 主语
that nations engage in 是 that 引导的定语从句,that在从句中作宾语,故可以省略
are various 系表结构
句子主干就是 The kinds of trade are various 贸易类型是多种多样的