Every nation has to follow a certain policy: Commercial, trade, various other types of policies.

Every nation has to follow a certain policy: Commercial, trade, various other types of policies.

每个国家都必须遵循一定的政策:商业、贸易、各种其他类型的政策。

-- A. P. J. Abdul Kalam 阿卜杜尔·卡拉姆