define

• The conditions under which field outbreaks take place are fairly defined .
  在野外情况下的发病已充分肯定。
• These limits, particularly the upper one, are not very well defined .
  这些界线，不是很严格的，尤其是上线。
• For a pure liquid or solid phase, x, the activity is defined as unity .
  对于纯液相或纯固相，X，其活度为1。
• The borderline between informal language and slang is hard to define .
  口语和俚语之间的分界线是很难确定的。
• A batholith has been defined as a huge intrusive mass of granitic rock .
  岩基的定义是巨大的花岗石侵入岩体。
• Perfect competition is defined by the economist as a technical term .
  经济学者把完全竞争当作一个专用的名词。
• Inertia scalars are defined in terms of quantities called inertia vectors .
  我们将用惯性矢量来定义惯性标量。
• The american movement towards the philippines began to be defined .
  美国人向菲律宾群岛挺进的动向已经明确了。
• A race is defined as a class of individuals with common characteristics .
  宗可定义为具有共同特征的一群个体。
• You can define the excessive speed of your motor-car by a speedometer .
  你可以用速测表来确定摩托车已经超速。