absence of system的用法和样例：
- On the study of system evaluation approach today,each decision unit is commonly regarded as one object and selected by evaluation institution,which is not reality because of the absence of rivalry.
- The absence of color in that drawing make it dull.
- We are in the absence of experience.
- Absence of mind is altogether an involuntary thing.
- The absence of color in that drawing makes it dull.
- In the absence of Mr. Jackson, we held a meeting.