许多无产者在工厂里辛勤工作以维持生计。

Many ___proletarians work hard in factories to make a living.

无产阶级只有团结起来才能争取更好的生活条件。

Only by uniting can the ___proletarians fight for better living conditions.

在资本主义社会中，无产阶级依靠出卖劳动力为生。

In capitalist societies, ___proletarians earn their living by selling their labor.