toluene in low concentrations 下低浓度甲苯
low concentrations of acid gas 低浓度酸性气
Low concentrations of chemotherapeutic drugs 低浓度化疗药物
triple-molecular model with low concentrations 低浓度三分子模型
low sublethal concentrations 次亚致死剂量
The recent work has been made possible by new techniques of molecular biology that allow viral DNA to be detected at low concentrations in the environment.
分子生物学的新技术使最近的工作成为可能，这种新技术能在环境中检测到低浓度的病毒 DNA。
Even caffeine, which is generally known only for its stimulatory effects, displays this property, depressing mouse locomotion at very low concentrations and stimulating it at higher ones.
就连人们通常觉得有刺激作用的咖啡因，也表现出了这种特性，它在浓度极低的情况下会抑制老鼠的运动，而在浓度较高的情况下则会刺激老鼠。
Very low concentrations of vanadium, which is scarce in meats and somewhat lower in nuts than in other plant resources, are good evidence of meat consumption and thus a better-balanced diet.
极低浓度的钒在肉类中很少见，在坚果中的含量也比在其他植物资源中较少，这很好地证明了吃肉的好处，从而使得饮食也更加均衡。
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