But, after a decent interval, trade relations began to return to normal.

但是在一段适当的间断之后，贸易关系开始恢复正常。

《柯林斯英汉双解大词典》

Some warn the measures could trigger a trade war. Others say they represent more normal trade relations.

VOA: standard.2009.11.10

Instead, Dorgan said, the U.S. should require China to obtain annual approval of normal trade relations.

FORBES: Magazine Article

China enjoys normal trade relations and, indeed, fat surpluses with almost all of its main partners.

ECONOMIST: China and trade

Mr Obama faces a tough fight in Congress, which has to approve permanent normal trade relations with Russia.

ECONOMIST: Russia and America