Thankless ; Dirty Work ; do a thankless job ; a thankless task
laboured ; labored ; laborious ; exacting
beat a dead horse ; in vain
吃力,汉语词汇。 拼音:chī lì 释义:指辛苦;劳累;费力,费劲。 语出宋 邵雍 《天意吟》:“未喫力时犹有说,到收功处更何言。”