Residents said local gang leaders had cashed in on the violence to seize valuable land. [VERB PREP. + on]

居民们说，当地的帮派头子用暴力夺取宝贵的土地。

He said that public servants should use government to serve and not to cash in. [VERB PREP.]

他说，公务员应该运用政府权力为民服务，而不是从中捞取好处。

Avoid cashing in a policy early as you could lose out heavily. [VERB PREP. noun]

不要提早兑现保单，那样你可能会损失惨重。

He did not cash in his shares. [VERB PREP. noun]

他没有把股票兑换成现款。