1、primary
首要的;主要的
That's the primary reason the company's share price has held up so well.
这是公司股票价格一直居高不下的主要原因。
I don't think young people's primary aim in life is to get drunk.
我觉得年轻人生活的主要目标并不是一醉方休。
(教育)初级的,初等的,小学的
Britain did not introduce compulsory primary education until 1880.
直到1880年,英国才开始实行初等义务教育。
Ninety-nine per cent of primary pupils now have hands-on experience of computers.
现在,99%的小学生都亲手操作过电脑。
首先的;最早的;最初的
It is not the primary tumour that kills, but secondary growths elsewhere in the body.
原发性肿瘤并不会置人于死地,致命的是身体其他部位的继发肿瘤。
They have been barred from primary bidding for clients.
他们被禁止对客户进行最初的投标。
2、prevent
防止;预防;阻止
These methods prevent pregnancy.
这些方法能防止怀孕。
Further treatment will prevent cancer from developing.
进一步的治疗将阻止癌症恶化。
阻止;制止;阻碍
He said this would prevent companies from creating new jobs.
他说这将使公司无法创造新的工作机会。
Its nationals may be prevented from leaving the country.
其国民可能会被禁止出境。












