But because of a revival of protectionism in the 1970s and '80s, problems began to develop.

但是由于七十年代和八十年代保护主义重新抬头，问题开始出现。

youdao

But because of a revival of protectionism in the 1970s and '80s, problems began to develop.

但是由于七十年代和八十年代保护主义重新抬头，问题开始出现。

youdao