When molybdenum is deficient, nitrate may accumulate to a toxic level in the plant.
当钼不足时，硝酸盐会积累在植物中达到毒害的程度。
The first step to controlling your anger, rather than having your anger control you, is to recognize your resentments and to express them before they reach a toxic level.
第一步是控制怨气，而不是让怨气控制你，弄清自己怨什么，并且把怨气达到毒害程度前释放出来。
If there's smoke in the cabin, get low and crawl below the level of the smoke and toxic fumes, so you can breathe until you get out of the plane.
如果机舱里有烟雾，把身体放低到烟雾与有毒气体的下面爬行，这样你能在你离开飞机前保持呼吸。
Better storage and safe use of chemicals at community level reduces exposures to toxic chemicals, especially among toddlers, who explore, touch and taste the products found at home.
在社区层次更好储藏和安全使用化学品可减少对有毒化学品的暴露，尤其在初学走路的儿童中，他们探索、触摸和品尝在家中找到的各种产品。
However, recent advances in molecular biology, genetics, and stem cell biology have provided scientists a new window onto the impact of toxic substances on the cellular and molecular level.
然而，最近分子生物学，遗传学和干细胞生物学方面的进步，已经为科学家在毒性物质对细胞和分子水平的影响方面提供了一个新窗口。
Although alcohol is toxic to fruit flies, it's even more toxic to wasps, which, unlike fruit flies, have not evolved a high level of alcohol tolerance.
尽管酒精对果蝇有毒，但酒精对黄蜂的毒性更大。与果蝇不同，黄蜂还没有进化成对高浓度酒精的耐受性。
ObjectiveTo investigate the level of microcystins(MC)in source and drinking water of a city along Lake Tiahu where toxic water blooms frequently occurred.
目的了解有毒蓝藻水华频繁暴发的太湖流域周边城市水源水和饮用水中微囊藻毒素（MC）的含量。
Conclusion: combination ofloxacin with isoniazid and rifampicin in mice increase hepatic toxic injury, but the level of injury was little lower than combination isoniazid with rifampicin.
结论：异烟肼和利福平联用氧氟沙星肝毒性增加，但并不比异烟肼和利福平联合时强。
Phillip Landrigan: However, we know so little about the toxic effects of these chemicals in humans, that just because the level is low doesn't mean you don't have to worry about it.
菲利普·兰德里根：但是目前人们对这些有毒化合物的危害知之甚少，不能因为它在人体中含量低就掉以轻心。
Conclusion: PRD can decrease the experimental hyperglycemia, It can increase the serum insulin level of the diabetic rats, It has no obviously toxic side effect.
结论：菩人丹可以降低实验性高血糖，提高糖尿病大鼠血清胰岛素水平，且无明显毒性作用。
The method of supercritical fluid extraction (SFE) has special physical and chemical properties, with high speed, high efficiency and high level of automation, using no or few toxic solvents.
超临界流体萃取技术依靠超临界流体独特的物理化学性质，具有快速、高效、不使用或少量使用有毒溶剂、自动化程度高等特点。
Objective To explore toxic effects of low level lead on blood pressure and hemoglobin as well as microcirculation.
目的探讨低浓度铅影响血压和血红蛋白的可能机制及其影响微循环的作用方式。
Because many antibacterials are toxic, various countries regulate the level of antibacterial residues in agricultural, veterinary, dairy, and meat-based food products.
由于很多抗菌药物具有毒性，许多国家都严格控制农业、兽医、乳制品和肉类产品中的抗菌药残留水平。
Goldfish should be avoided because of certain treatment (copper sulfate) the fish farms use that is toxic to turtles after a certain level is reached.
请不要使用金鱼作为饲料，因为某些金鱼饲养场使用硫酸铜处理金鱼，当硫酸铜达到一定浓度时是对龟有毒的。
Animals ingest vanadium from air and feed resources, while the moderate level of vanadium is in favor of the growth of animals, but excessive dosage could have toxic effects on the health of animals.
动物可以通过空气和饲料原料来获取钒，适量的钒有利于动物的生长，但是过量就会对机体产生毒性作用。
Conclusion Polycyclic aromatic hydrocarbons (PAHs) has a strong genetic toxic effect and can cause P21 level increase in earlier stage among occupational workers.
结论多环芳烃类混合物具有较强的遗传毒性，可使职业工人在早期接触阶段出现P 2 1的高表达。
The method has advantages of simple operation, good linearity, cheaper reagents with little toxic, and it does not need the special precision instrument. The method is suitable for basic level unit.
该方法简单，线性好，使用的试剂毒性小且廉价易得，不需特殊精密检测仪器，适用于基层单位。
The method has advantages of simple operation, good linearity, cheaper reagents with little toxic, and it does not need the special precision instrument. The method is suitable for basic level unit.
该方法简单，线性好，使用的试剂毒性小且廉价易得，不需特殊精密检测仪器，适用于基层单位。
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