用化学的例句（用化学在句子中的用法）

• There may be a need for retarding growth chemically to keep trees within bounds. 可能需要用化学剂抑制生长,使树冠保持在一定的范围内.
• Perching can be discouraged by scaring, shooting or chemical repellants. 轰吓 、 射杀或者用化学忌避剂可防止鸟类栖息.
• Contaminated instruments and floor surfaces should be chemically disinfected. 污染的器材和地面要用化学药物消毒.
• The reaction conditions on oxidation of 2 - methylpyridine to 2 - acid by oxidation of potassium dichromate were studied. 研究了以2-甲基吡啶为原料,以重铬酸钾为氧化剂,利用化学氧化法合成 2- 吡啶甲酸的反应条件.
• Conducting polyaniline ( PANI ) and poly - O - methylaniline ( POT ) were prepared by chemical oxidation method. 用化学氧化法制备导电聚苯胺 ( PANI ) 和聚邻甲苯胺(POT ).
• Electroless plating method is applied to metallize the AlN sbstrate. 应用化学镀镍的方法实现了氮化铝的金属化.
• Huntsman is a global manufacturer and marketer of differentiated and commodity chemicals. 亨斯迈是精细化学品及通用化学品的全球制造商及营销商.
• 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。
• Chemical weapons are banned internationally. 国际上禁止使用化学武器。
• A device or substance gas, used to incapacitate riot control. 用化学物质杀死 、 伤害或使敌人无力的战争.
• Objective : To explore novel strategy for soman antidote by chemical immunization. 文摘:目的: 探索用化学免疫方法防治梭曼中毒.
• Can determine a chemical into the EU limit for hexavalent chromium test instructions. 可用化学法进一部确定,欧盟针对六价铬的测试限量指令.
• These lasers usually employ chemical combustion to energize directly the lasing process by various one - way reactions. 这些激光器一般利用化学燃料,通过各种 单向 反应直接驱动激射过程.
• This article reports a method of preparation of metal - copper - powder with cuprammonia by directly chemical method. 本文报导了一种用化学方法直接从铜氨溶液中制取金属铜粉的方法.
• Citral is a kind of natural spice used widely in food and daily chemical goods. 柠檬酸是一种广泛应用于食品和日用化学品工业的天然香料.
• Some industrial chemicals can be very toxic or carcinogenic. 一些工业用化学品具有高度毒性或是致癌物质.
• Silver - coated carbonyl iron powder was prepared by using electroless plating method. 用化学镀法,甲醛为还原剂,制备镀银羰基铁粉.
• The active oxygen radicals of cultured bezoar have been studied by chemiluminescence. 运用化学发光技术研究了培植牛黄的活性氧自由基.
• Chemical allopathic veterinary drugs and antibiotics is prohibited. 禁止使用化学对抗疗法的兽药和抗生素.
• ...farming without any purchased chemical, fertilizer or pesticide... 不购买使用化学药剂、肥料或杀虫剂的耕种