Retire v. 退休
Jack Ma will retire as chairman from Alibaba Group a year later.
Resign v. 辞去职务
The Alibaba Group said on Monday that Jack Ma would resign as chairman.
Step down 退位，让位
Jack Ma, who founded e-commerce giant Alibaba Group, announced on Monday that he will step down as the company's chairman next September.
Quit v. 辞职
He quit his job after an argument with a colleague.
Sack v. 开除，解雇
She was sacked for refusing to work on Sundays.