láo xīn
意思解释：（Work with one's mind or brains）动脑筋。 费心思，忧心。 忧心。
从事脑力劳动。《国语·鲁语下》:君子～，小人劳力。②费心思。高适《秋胡行》:～苦力终无恨，所冀君恩那可依。…
Be engaged in mental work. below mandarin · Lu Yu : imprints Shen of ＂ of Α of dead soil of ∪ grinds it is flesh coolie of ～ of small of of Qiang of abdomen of 8 Ling province does not have hate eventually, ennake depends on Suo Jijun. ...
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