volatilesn.挥发组分volatileadj.不稳定的；反复无常的；易挥发的n.挥发物volatile terpenoids萜烯化合物volatile separation耐挥发分离volatile fatty acid挥发性脂肪酸volatile checkpoint易失性检查点volatile base value挥发碱值Volatile constitute挥发组分Volatiles compounds挥发物volatile resistance耐挥发度volatile anthracite无烟煤volatile ingredient挥发成分

1. The outside temperature in countries outside the Tropic belt is too volatile and too cold to allow the tree to develop.
   在这条回归线带外边的国家的室外温度太易变并且太冷不能允许树生长。