他在会议上称那些反对资本主义的人为共产党分子。

He called those who opposed capitalism ___commies during the meeting.

上世纪50年代，许多美国工人认为共产党人在推动改善工作条件方面发挥了关键作用。

In the 1950s, many American workers believed ___communists played a key role in advocating for better working conditions.