HSK 7-9
脚踏实地
jiǎotāshídìto have one's feet firmly planted on the ground (idiom); realistic without flights of fancy; steady and serious character
做研究必须脚踏实地查证资料。
Zuò yán jiū bì xū jiǎo tà shí dì chá zhèng zī liào.
Researchers must stay grounded and carefully verify their sources.
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Appears across levels (7-9) in the HSK 3.0 word list.