1.  Why can't a subject advance any more when it reaches a certain level?

2.  Many people may wonder why the same discipline can no longer make a huge breakthrough after it has made a certain level of accomplishment.

3.  singapore is a terrific country and it will reach the sky at a certain level.

4.  Those for women may include a minimum height requirement and a certain level of attractiveness (presumably to be determined at the employer's discretion).

5.  But when the production capacity reaches a certain level, economic development should no longer be aimed at expanding it further.

6.  So during in the future, they pretty much are ready to taking a big step from the school to an other level.