英汉词典

1. 限制，限定（大小、规模等）
    If you restrict something, you put a limit on it in order to reduce it or prevent it becoming too great.

restrict的解释

    e.g. There is talk of raising the admission requirements to restrict the number of students on campus...
           有传闻称将通过提高录取条件来限制在校学生的数目。
    e.g. The French, I believe, restrict Japanese imports to a maximum of 3 per cent of their market.
           我认为，法国将把从日本的最高进口量限制在其市场总量的3％。