It is very significant to study the cushioning effects of geology environment on acid harm whatever in theoretical and practical or immediate aspect.
开展地质环境对酸雨危害降解效应的研究具有重要的理论与现实意义。
The concentration< of acid in these products is so low that our digestive systems are easily capable of coping with it with no harm to us.
这些产品的酸浓度非常低，我们的消化系统很容易就能处理它们，不会对我们造成任何伤害。
Rinse after a few minutes, because long-term exposure to the acid in the lemon can harm tooth enamel.
几分钟之后用清水漱口，因为长期接触柠檬酸对牙釉质有伤害。
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