Definition
To be very serious and determined to do something.
真的，认真的
When he started going to the gym at six every morning, I realized he meant business.
当他开始每天早上六点去健身房时，我意识到他是认真的。
She told the team that this time the deadline was absolutely non-negotiable, she meant business.
她告诉团队这次的截止日期绝对不容商榷，她是认真的。
When the company announced that all employees must return to the office, they meant business.
当公司宣布所有员工必须返回办公室时，他们是认真的。