chemicals

• Sodium and potassium are about the same in their chemical properties .
  钠和钾的化学性质几乎是相同的。
• The chemicals are not distributed evenly through-out the brain .
  这些化学物质在脑内并不是均匀分布的。
• Their tasting action is a chemical process, like smell .
  他们的尝味作用，像嗅觉一样，是一种化学过程。
• The process of making silage is a form of chemical treatment .
  调制青贮饲料的过程即为化学处理的一种方式。
• This paste contains dye, thichener, water and other chemicals .
  印花浆含有染料，增稠剂，水和其它的化学品。
• Processes that consist of molecular changes are called chemical reactions .
  包含分子变化的过程称作化学反应。
• Ammonia has been one of the more difficult basic chemicals to synthesize .
  氨曾是一个较难合成的基本化工原料。
• The rest of the chemical elements occur in only minor or trace quantities .
  其余的化学元素仅以少量或微量出现。
• The early definitions stressed a blend of biological and chemical control .
  早期的定义强调生物和化学防治结合。
• Two types of chemical kinetic models have proven especially fruitful .
  两类化学动力模型业已证明效果是特别好的。