Digital electronics technology is a complex logical course, it is rather difficult to understand and abstract.

《数字电子技术》是逻辑性很强的一门课程，内容抽象难懂。

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Third, the industry does not generally offer value-for-money products, but rather an array of proliferating instruments that are difficult to compare and understand.

ECONOMIST: Saving

This is not to spy on people, but rather to help companies understand the state of their workforce and make some vitally important (and difficult) business decisions.

FORBES: How BigData Tools Helps HR Understand You