The influence of average air temperature on the callus differentiation ability was also not clear. 愈合组织的分化率并不随著愈合组织形成率的高低而变化，亦无法找出其与外界温度的关系。
A fuel too volatile for the outside temperature, or a missing restrictor in the vapor line, will also cause improper engine idling. 就外界温度而言，燃油的挥发性过高，或蒸汽管路中的节流器有故障，也会使发动机的怠速不稳。
