Condoms are an effective method of birth control if used with care.
避孕套如果谨慎使用，是一种有效的节育方法。
Although most condoms contain spermicide, there are some manufactured without.
尽管大多数避孕套都含有杀精剂，但也有一些是不含的。
On many levels, AIDS prevention and condoms go hand in hand.
但在大多数国家的调查发现，在艾滋防治方面都有显著的进展。
But the best thing about female condoms is that they put women in charge.
而其最大的好处就是该产品让女性也能主动使用。
Of these, around 4.4 billion condoms were used for family planning and 6.0 billion condoms for HIV prevention.28.
这其中约有4.4亿被用在家庭计划中，约6亿被用来预防HIV感染。
That being said, condoms are not tested for strength against the wet conditions, heat, or chemicals found in pools and hot tubs.
但是话虽这样说，这些测试并不是在水湿的条件下进行。何况，浴缸、泳池与河海的温度与化学状况已经不同。
The evidence for the effectiveness of condoms is clearest in studies of couples in which one person is infected with HIV and the other not (discordant couples).
在研究大量夫妻事例中，其中一人感染HIV而另一人没有感染（随机抽取夫妇），得到了很明显的证明。
The evidence for the effectiveness of condoms is clearest in studies of couples in which one person is infected with HIV and the other not (discordant couples).
在研究大量夫妻事例中，其中一人感染HIV而另一人没有感染（随机抽取夫妇），得到了很明显的证明。
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