Because he has no systematic understanding of the content and circumstances of the assignment,or because he has had little or no contact with such work,and so the laws governing it are beyond him.

• 因为他对于这项工作的内容和环境没有规律性的了解，或者他从来就没有接触过这类工作，或者接触得不多，因而无从谈到这类工作的规律性。