According to ACOG, flu vaccination should be a routine part of prenatal care, and the ideal time to vaccinate pregnant women is October and November.
据美国妇产科学会称，流感疫苗应作为常规产前保健的一部分，而且为孕妇注射疫苗的最佳时间是10月和11月。
In its latest position paper, the American dental Hygienists' Association advises that polishing should not be considered a routine part of a dental cleaning.
美国牙医协会在其最新的意见书中指出抛光无需被视作洗牙的必要步骤。
Exercise should be a part of our daily routine.
锻炼应该成为日常生活的一部分。
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