basic strength的用法和樣例：
例句
- The Chinese working class has always been the basic force for promoting the advanced productive forces in China.
中國工人階級始終是推動中國先進生產力發展的基本力量。 - A solid alliance of the workers,the peasants and the petty bourgeoisie is the basic force for defeating Japanese imperialism and the traitors and collaborators.
工農小資產階級的堅固聯盟，是戰勝日本帝國主義與漢奸賣國賊的基本力量。
