"两轮培训" 的英文表达是 "two rounds of training"。

这个表达方式来自英语中常用的短语 "round of",意思是 "一轮,一圈"。例如,"a round of applause" 意思是 "一轮掌声","a round of golf" 意思是 "一轮高尔夫"。所以 "two rounds of training" 就意味着 "两轮培训"。

下面是一些例句,希望能帮到你:

We had two rounds of training on how to use the new software. (我们进行了两轮有关如何使用新软件的培训。)
She needs to go through two rounds of training before she can start her new job. (她需要经过两轮培训才能开始新工作。)
The company offers two rounds of training for new employees. (公司为新员工提供两轮培训。)