Carbon dioxide in high concentrations is toxic to humans.
高浓度二氧化碳对人体有毒。
High concentrations of many of these chemicals are found in secondhand smoke.
研究发现二手烟中含有高浓度的上述有害物质。
In both cases, high concentrations of the gas are dark, while low concentrations are light.
在两幅图中，气体密度越高的区域颜色也就越深，低密度区则更浅。
In the morning, sunlight contains high concentrations of this blue light.
早上的太阳光里面包含了高浓度的短波蓝光。
Prolonged exposure to high concentrations may eventually result in death from asphyxiation.
持续暴露于高浓度会最终导致由于窒息而死亡。
The concentrations of total phosphorus was high in winter, low in summer.
全磷含量是冬季最高，夏季最低。
The concentrations of total phosphorus was high in winter, low in summer.
全磷含量是冬季最高，夏季最低。
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