replenish;get more;vamp up ;

She had to make up her income as a pianist by teaching piano students.
她这个钢琴家的收入得靠教人弹琴来添补.
来源:《简明英汉词典》Perhaps I could fill in for one of your office staff during the vacation period.
在假期中我或可添补贵公司空缺.
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