toxic

• The toxic level of retinol is about 500 times the minimum requirement .
  视黄醇的中毒水平为最低需要量的500倍。
• Partial thyroidectomy for toxic goiter was practiced widely .
  用甲状腺部分切除治疗急性甲状腺肿一直被广泛采用。
• Prolonged therapy should be avoided since it is conductive to toxic reactions .
  应避免延长治疗，因为它可导致毒性反应。
• 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。
• He has found that smoke and toxic gases can be transported swiftly up through the atrium .
  他发现烟和毒害性气体可通过中庭迅速向上传播。
• They may contain toxic substances which have an adverse effect on biological systems .
  工业废水中含有对生物处理系统有不良影响的有毒物质。
• Some materials produced by the body are, of course, toxic if accumulated in too large amounts .
  当然身体中产生的某些物质如果积蓄量太大了，就会有毒性。
• Toxic manifestation are usually associated with borate concentration in excess of 10.0mg/1ooml of blood .
  血液中硼酸盐浓度超过10.0mg/1OOml与中毒现象有关。
• Many of these products are toxic to animals and other plants, or at least repellent .
  这些产物的大多数对于动物和其它植物是有毒的，或者至少是有驱避作用的。
• Many microorganisms synthesize and excrete compounds which are selectively toxic to other microorganisms .
  许多微生物能合成并分泌一些对其它微生物具选择性毒力的化合物。