inelasticity

这种塑料的缺乏弹性使其在高温下容易断裂。

The ___inelasticity of this plastic makes it prone to breaking under high temperatures.

汽油的需求缺乏弹性，即使价格上涨，人们仍然需要开车出行。

The ___inelasticity of gasoline demand means people still need to drive even when prices rise.