英文简历：离职原因

为更专门的工作 for more specialized work

为晋升的`前途 for prospects of promotion

为更高层次的工作责任 for higher responsibility

为扩大工作经验 for wider experience

找一份更好的工作 to seek a better job

由于雇用期满 due to expiry of employment

找到了更好的工作 sought a better job

由于公司倒闭 due to close-down of company