Supplementary nutrition, moth Gu Chi, double-effect one, give you a more comprehensive care.
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"Double spike" isotopic dating method of lead isotope is one of the dating ways of lead isotope, its aim is to correct mass differentiation effect and enhance the precision of measure.
铅同位素“双稀释剂”同位素定年法是当前应用较广的一种铅同位素定年方法。双同位素稀释法的目的在于校正质量鉴别效应，提高测定精度。
There are two reasons for negatives in measuring double-frequency induced polarization, one is electromagnetic coupling effect, the other is geo-boby existing in an impersonal way.
引起双频激电仪野外测量出现负值的原因主要有两类：一类是由于电磁耦合效应；另一类是由于地下地质体的影响。
Most of drugs have double effects, one side is to treat diseases and another is side effect. So is even more antitumor drug.
大多数药物均具有两重性，一方面能治疗疾病，另一方面又具有副反应，抗肿瘤药更是如此。
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