在有些油田卤水中，钡的浓度大于100毫克升。
Barium is found in some oilfield brines in concentrations greater than 100mg/litre .
一升茶树含有高达9毫克的氟化物，过量会导致氟骨症，降低骨骼质量，导致疼痛和韧带僵硬。
A litre of teacan contain up to 9mg of fluoride, which in excess can cause skeletal fluorosis, reducing bone quality and causing pain and stiffening of the ligaments.
它和千克（10升蒸馏水的重量）一起构成了公制计量的基本单位。
Together with the kilogram, initially the mass of a decaliter of distilled water, it formed the basis of the metric system.
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