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...
当成核过程完了时,溶液中应不再有胶束存在.At the end of the nucleation process micellar soap should no longer be present in solution.介绍了胶束混配络合物的反应特点和形成条件.The formation characteristics and conditionsof micellar mixed ligand complexes are also...
The greenback also rose against the euro, which bought $ 1.4392.美元对欧元也走强,买入价为1.4392美元每欧元.The yen slipped against the greenback , trading at 120.34, down 0.78 yen.日元对美元的汇率以120.34兑1美元收盘, 下跌0.78日元.Against other gauges the g...