一定

一定

"Certain," "fixed," or "consistent."

『一定』 here conveys a sense of consistency or a stable degree in relation to temperature.

この部屋には一定の温度が保たれています。

This room maintains a constant temperature.

In this case, 『一定』 describes the steadiness and lack of fluctuation in his academic performance.

彼の成績は一定していて、高い水準を保っています。

His grades are consistent, maintaining a high standard.

Here, 『一定』 is used to signify a determined or minimum required amount of effort.

成功するためには、一定の努力が必要です。

To succeed, a certain amount of effort is necessary.