| 例句 |
Sex identity is fixed at conception.在受孕时婴儿的性别就确定了。The pill was once expected to limit the number of unwanted pregnancies, but instead the number has soared.人们曾期望这药能限制意外受孕的数字，但实际上数字反而大大增加了。Kelpie was unable to conceive when we tried mating her with another dog in Norwich.我们用诺里奇的另一条狗给开尔比犬配种，结果它没能受孕。A single sperm fertilizes an egg.一个精子能使卵子受孕。The Catholic church teaches that life begins at conception.天主教会教导说生命始于受孕。Norman's efforts to impregnate her failed.诺曼想使她受孕的努力失败了。Abortions would only be allowed in cases of rape or incest.只有被强奸或乱伦受孕才允许堕胎。Her pregnancy test was negative.她的受孕测试呈阴性。About one in six couples has difficulty conceiving.大约六对夫妻中就有一对难以受孕。 |