有机食品是未使用人工化学制剂和杀虫剂的纯净食品。
Nitrates are chemicals that occur naturally in water and the soil.硝酸盐是水和土壤中自然存在的化学物质。
Protective gloves reduce the absorption of chemicals through the skin.防护手套可以减少皮肤对化学物质的吸收。
The technique has been to mutate the genes by irradiation or chemicals.该技术是通过放射线照射或者使用化学方法使基因变异。
These chemicals modulate the effect of potassium.这些化学物质可以调节钾的功效。
The land has been completely poisoned by chemicals.土地已被化学品彻底污染。
Heavy industry pollutes our rivers with noxious chemicals.重工业产生的有毒化学品会污染我们的河流。
chemicals were pointlessly poisoning the soil.化学品在无谓地污染着土壤。
The levels of chemicals in the river are not insignificant.河水中的化学物质含量不容忽视。
minute amounts of chemicals in the water水中含量极小的化学成分
An imbalance in certain chemicals leads to disturbances in the brain's function.某些化学成分失衡会道致大脑功能的紊乱.
Certain chemicals can induce undesirable changes in the nervous system.有些化学物质能在神经系统中引起不良变化.
Scientists tried out thousands of chemicals before they found the right one.科学家们试验了数千种的化学药品才找到一种合适的.
The fission of the cell could be inhibited with certain chemicals.细胞的裂变可以通过某些化学药品加以抑制.
Certain chemicals are easily absorbed into the bloodstream, while others are not.某些化学药品很容易溶于血液, 有些则不行.
