1. 全神贯注;集中（心思）
    If you concentrate on something, or concentrate your mind on it, you give all your attention to it.

    e.g. It was up to him to concentrate on his studies and make something of himself...
           是否能专心学习并取得一定成就要靠他自己。
    e.g. Water companies should concentrate on reducing waste instead of building new reservoirs...
           自来水公司应该集中精力减少水浪费，而不是修建新水库。

2. 使集中;使汇集
    If something is concentrated in an area, it is all there rather than being spread around.

    e.g. Italy's industrial districts are concentrated in its north-central and north-eastern regions...
           意大利的工业区集中在该国中北部和东北部地区。
    e.g. Most development has been concentrated in and around cities.
           土地开发主要集中在城市及周边地区。

3. 浓缩液;浓缩物
    Concentrate is a liquid or substance from which water has been removed in order to make it stronger, or to make it easier to store.

concentrate是什么意思

    e.g. ...orange juice made from concentrate.
           用浓缩橙汁冲兑的橙汁

4. 使清楚地思考
    If you say that an unpleasant fact or situation concentrates someone's mind, you mean that it makes them think clearly, because they are aware of the serious consequences if they do not.

    e.g. A term in prison will concentrate his mind wonderfully.
           一想到要被判刑，他的头脑就会变得非常清醒。