同根派生 social unit相关词英汉例句The family is a small social unit.家庭是一个小的社会单位。As the basic unit of the administrative system in China, Villages exist in Scenic spots and Historic sites vastly.摘要村庄作业我国行政体系中最基本的社会单位,广泛存在于风景名胜区范围内。social unit更多例句