occurring

• Cyclization occurs readily with dilute alkali .
  遇到稀碱就容易环化。
• The thought of resigning never occurred to me .
  我从来没想过要辞职。
• Lassitude occurs early in the course of the disease .
  病初出现疲倦。
• This deal occurred in a pairs event .
  这局牌是一次双人比赛中出现的。
• A strong objection at once occurred to us .
  我们立刻遇到强烈的反对。
• A condensation to quinoid systems occurs .
  发生了醌型体系的缩合反应。
• Wounds frequently occur as a result of pruning .
  修剪往往造成损伤。
• Hyperglycemia and glycosuria tend to occur .
  可能发生血糖过高或糖尿。
• However, two other manifestations may occur .
  继而会出现其他两种表现。
• It occurred only on "hybrid habitats" .
  它只在“杂种生境”内表现出来。