1·The police have launched a major operation against drug suppliers.
警方发动了一次打击毒贩的大规模行动。
—— 《牛津词典》
2·He is having a major operation.
他正在接受一次大的手术。
3·Weight-loss surgery is a major operation.
这是大手术。
4·She had a major operation last month.
她上个月初了次大手术。
5·Her father underwent a major operation last week.
她父亲上周动了一次大手术。
6·Her mother was about to undergo a major operation.
她的母亲即将经受一次大手术。
7·Her mother was about to undergo a major operation.
她母亲将要经受一次大手术。
8·It take a major operation to extract money from a minor poet.
要从小诗人那儿榨出钱来，得施行一次大手术。
9·It takes a major operation to extract money from a minor poet.
要从小诗人那儿榨出钱来，得施行一次大手术。
10·He must have a major operation on his knee to mend severed ligaments.
他必须在膝盖上动一次大手术，以修复断裂的韧带。