零敲碎打 piecemeal
Explanation
形容做事没有计划，断断续续，不成系统。
describes doing something without a plan, piece by piece, and incoherently.
Origin Story
小明要完成一个大型拼图，他没有制定计划，而是零敲碎打地拼，一会儿拼一点，一会儿又放下，效率很低。经过很长时间，他才勉强完成，效果也不理想。后来，他吸取教训，认真制定计划，按部就班地完成任务，效率大大提高了。
Xiaoming wanted to complete a large jigsaw puzzle. He didn't make a plan, but pieced it together piecemeal, sometimes a little bit at a time and sometimes putting it aside. His efficiency was very low. After a long time, he barely managed to complete it, and the effect was not satisfactory.Later, he learned from his lessons, carefully made a plan, and followed it step by step to complete the task. His efficiency improved greatly.
Usage
用于形容做事不系统，断断续续。
Used to describe doing things unsystematically and intermittently.
Examples
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他学习总是零敲碎打，缺乏系统性。
ta xuexi zongshi ling qiao sui da, quefue tixitonxing
His study is always piecemeal and lacks systematicity.
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这件事我们零敲碎打地做了好几个月，终于完成了。
zhe jianshi women ling qiao sui da de zuole hao ji ge yue, zhongyu wanchengle
We have been doing this piecemeal for months, and finally completed it.