在多元社会中经常存在种族紧张关系。

There is often ethnic ___tension in diverse societies.

两国之间的紧张关系日益加剧。

There are growing ___tensions between the two countries.

我只有八岁，但能感觉到父母之间的紧张气氛。

I was only eight years old, but I could feel the ___tension between my parents.