He knew that his apprehension was in part due to his lack of knowledge of Six Sigma.

他知道他的忧虑部分原因是对六西格玛原则的不了解。

youdao

He knew that his apprehension was in part due to his lack of knowledge of Six Sigma.

他知道他的忧虑部分原因是对六西格玛原则的不了解。

youdao