follow the herd 随波逐流，随大流；人云亦云

实例：

1.Be willing to be different. Don't follow the herd. Do what is best for you and your situation.

要愿意与众不同，把自己区别于芸芸众生。做对自己和自己的处境有利的事儿。

2.He had no opinions of his own but simply follow the herd.

他从无主见，只是人云亦云。

出处：头条号 @坚小持微课