这是个典型的强调句型：It is + 被强调部分 + that + 其它成分这里被强调的部分是个what引导的名词性从句，what these individual contribute to their places of work意为：这些人对他们工作单位所做的贡献全句的参考译文：
正是由于这些人对他们工作单位所做的贡献，才使你意识到他们有多重要。...
强调句 it is +强调部分+that/who +句子其他成分强调主语what these individual contribute to their places of work 不用强调句型 what these individual contribute to their places of work makesyou realize ...
