a certain lack of的用法和样例：
- Humor, levity, and a certain lack of seriousness can be helpful in relating to others. At the end of the day, people at work are just that: people at work.
- Aiming at a certain lack of automatic training means, this article proposes the design and reali-zation schemes applied to the radar brigade/regiment command post,where the main innovatary and key points are described.
- The main impediment to growth is a lack of capital.
- I noticed a certain coolness(ie lack of friendliness)between them.
- The novel unrolls the history of a certain woman.