英语翻译An awareness that they were being experimented upon seemed to be enough to alter workers` behavior by itself.

An awareness （that they were being experimented upon ）seemed to be enough （to alter workers` behavior ）（by itself）.
1.句子主干
An awareness （主语）seemed（系动词） to be enough （表语）
主系表 结构的句子
2、修饰成分
enough to do sth 足够做某事
（by itself）作状语 修饰 alter
》that 引导定语从句
定语从句和同位语从句不同点就在在，定语从句中的连接词在从句中充当成分，同位语从句不充当成分，只起连接作用。
这里的that充当从句中的宾语成分

同位语从句~~that引导的从句，解释说明awareness~~用法相同的词还有report,suggestion etc...

由先行词awareness引导的同位语从句（that they were being experimented upon）主语：An awareness谓语：seemed宾语：to be enough to alter workers' behavior by itself定语：were being experimented upon状语：...

that 引导的同位语从句： that they were being experimented upon ，主语
An awareness ，谓语seemed to 宾语alter workers` behavior