e aware of 知道……；意识到……；觉察到……
be curious 后面的介词习惯用 about.
【a survey of china's netizens】【主语】【 found】【谓语】
【that some smokers are unwilling to kick the habit because they aren't fully aware of the harm it does to health】宾语从句
【because they aren't fully aware of the harm it does to health】【原因状语从句】
【it does to health】【定语从句】补充完整之后是it does harm to health