铜是植物生长发育必需的微量元素，但过量的铜对植物有毒害效应。
Copper is an essential micronutrient for plant metabolism, but it becomes extremely toxic when presenting in excessive amount.
本文介绍了烟气中有毒成分自由基的形成、性质及对人体的危害，并介绍了对植物添加剂降低清除烟气自由基的研究进展。
Not only the formation, characters and harmfulness were introduced, but also the removal of free radicals in cigarette smoke by plant additives was discussed in detail.
在过去，研究昆虫对植物防御的适应性方面始终关注的是化学反馈，也就是说昆虫如何中和或者改变植物产生的有毒物质。
In the past, scientists who studied insect adaptation to plant defenses have focused on chemical responses. That is, how the insects can neutralize or alter the poisonous substances plants produce.
应用推荐