The state of his mind is being enquired into.
人们正在探询他的心境。
The design, operating parameters of the project and mechanism of pollutant removal were enquired into with the analysis of technique and economy.
对示范工程设计运行参数和污染物去除机理进行了探索，并进行了技术经济分析。
Several years ago, a resident who appeared to be a simple peasant walked /into/ a five-star hotel located in downtown Beijing, and enquired about accommodation.
几年前的一天，一位农民走进北京市中心的一家五星级饭店，向前台小姐询问住宿情况。
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