interest利益 可数吗

　　It would be interesting to know what he really believed.

　　了解他的真实信仰会是很有意思的。

　　They decided to sound out her interest in the project.

　　他们决定试探一下她对那个项目的兴趣。

　　Interest rates can be controlled by order of the central bank.

　　利率可由中央银行指示控制。

　　Most of their economic policies serve the interests of big business.

　　他们的经济政策多半符合大企业的利益。

　　Social workers must always consider the best interests of their clients.

　　社会工作者必须时刻考虑其当事人的最佳利益。