VOA慢速英语:Delay Pregnancy After a Miscarriage?

1. Up to twenty percent of known pregnancies end in a miscarriage.
 
up to （数量上）多达；（时间上）直到
例句：The bill footed up to $1,000. 
账单结算总计1,000元。 

2. Miscarriages are generally caused by genetic problems with the baby that prevent it from developing.

prevent from 阻止;制止
例句：Nothing can prevent him from going.
什么都不能阻止他前往。

3. A two thousand five report from the World Health Organization advised waiting at least six months.

at least 至少
例句：He smoked at least half a packet of cigarettes a day.
他每天至少抽半包烟。

4. That compared to seventy-three percent of women who waited more than two years.

compare to 把...比作
例句：He compared the girl to the moon in the poem.
他在诗中把那姑娘比作月亮。

5. The researchers pointed out that their results were limited to Scottish records and could not be generalized to all women.

point out 指出
例句：He pointed out the mistake to me.
他向我指出错误。