churn
verb uk/tʃɜːn/ us/tʃɝːn/
(MOVE/MIX)
[ T ] (also churn up)剧烈搅动（尤指液体）;翻搅;使猛烈翻腾
to move something, especially a liquid, with great force
The sea was churned up by heavy winds. 狂风搅得大海白浪滔天。
[ T ]用搅乳器搅拌（牛奶以制成黄油）
to mix milk until it becomes butter
[ I ]（通常指由于紧张而）胃部翻腾，反胃，恶心
If your stomach is churning, you feel ill, usually because you are nervous.
I had my driving test that morning and my stomach was churning. 参加驾照考试的那天早上，我的胃里一直在翻腾。
(CUSTOMERS)
[ I or T ] business specialized（顾客）辗转光顾提供某种商品（或服务）的不同公司
If customers churn between different companies that provide a particular service, they change repeatedly from one to another.
Phrasal verb
churn something out （不顾质量快速地）大量生产;粗制滥造
to produce large amounts of something quickly, usually something of low quality
The factory churns out thousands of pairs of these shoes every week. 那家工厂每周生产数千双这样的劣质鞋子。
She churns out a new best-selling novel every year. 每年她都能炮制出一本新畅销小说。
churn
noun uk/tʃɜːn/ us/tʃɝːn/
(CONTAINER)
[ C ]奶罐，奶桶;搅乳器
a large container for transporting milk or for making milk into butter
a milk churn 盛奶罐
a butter churn 搅乳器
(CUSTOMERS)
[ S or U ] business specialized (also churn rate)（客户）流失率
the number of customers who decide to stop using a service offered by one company and to use another company, usually because it offers a better service or price
Internet and cable television companies suffer from a high churn rate. 互联网公司和有线电视公司的用户流失率很高。