Condoms are an effective method of birth control if used with care.如果使用得当，避孕套是很有效的避孕手段。Although most condoms contain spermicide, there are some manufactured without.虽然多数避孕套含有杀精剂，但也有一些是不含的。Abstain from sex or use condoms....
Condoms are an effective method of birth control if used with care...如果使用得当,避孕套是很有效的避孕手段。Abstain from sex or use condoms...禁绝性事或使用安全套。These days shredding means destroying most everything , from bottles and cans to defec...
The magnetism and ferroelectricity were detected.在室温下探测到了共存的磁性和铁电性.On the other hand, a high remanent polarization indicates a strong ferroelectricity, which enhances piezoelectric properties.另一方面, 高的剩余极化强度Pr使材料铁电性的增强, 有...
...students who play intercollegiate athletics.参加大学校际体育竞赛的学生He takes part in the intercollegiate sports every year.他每年参加大学校际运动会.intercollegiate athletic competition大学校际体育竞赛This competition revealed the high English stand...
In the midst of a glade were several huts.林中的空地中间有几间小木屋.I feel deep sorry and glade for all of them.我感到深切遗憾和林间空地的全部.The traveler sit on a glade in the forest.旅行者坐在森林中一块空地上....