FAQs About the word knuckle down (to)

专注于(某事)

埋头苦干,浓缩(于),落下,专注于,定居 (下来),地址,办法,脸,插手,专注于

避免,规避,躲避,摆弄,空闲,滞后,混乱,猴子(周围),玩,戳

knows => 知道, know-nothingisms => 不懂装懂, knowledges => 知识, know-hows => 诀窍, knouts => 鞭子,