Definition: to use a lot of effort/expense, etc. to do something Level: C2
研究人员将不遗余力地寻找这种疾病的治疗方法。
The researchers will ___spare ___no ___effort to discover a cure for the disease.
她不辞辛劳地确保她的孩子接受最好的教育。
She ___spares ___no ___pains to ensure her children receive the best education.
这家公司在推出新产品时不惜代价。
The company ___spared ___no ___expense in launching its new product.
