参考了下gamtclub上有人的解释，When "research" alone is used as a verb, no preposition should be used. eg. we should research books
When a verb such as as "do" or "conduct" is placed before the word "research" (which is then used as a noun), a preposition should be used. "On," "into," and "about" are all acceptable. eg. we conduct a research on behaviors of human
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发表于 2020-5-11 14:10:42
