...为了解情况进行考察) investigate; examine; inquire into; look into; survey; (try to) learn the facts about; on (closer) investigation; make an investigation on [of; into]; hold an inquiry into sth.; make inquiries about sb. [sth.]; on inquiry; search into; carry out a research; make a survey of; see into; engaged in research into; make a researching inquiry 2.
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