unless例句
The targets would not be achieved
unless other departments showed equal commitment.
除非其他部门同样努力，否则这些目标无法达成。
The South African mailboat arrived on Friday mornings
unless bad weather intervened.
除非受恶劣天气干扰，南非邮船一般在星期五上午抵达。
All bitches should be spayed
unless being used for breeding.
除非是用作种犬，所有的母犬都应摘除卵巢。