Invariableness
n. 不变, 不变性
🗣️ 情景例句
Is he still with IBM?
他还在IBM工作吗？
I have great difficulty in understanding him.
我觉得很难理解他。
and so the tools of long ago have remained when even the bones of the men who made them have disappeared without trace.
因此，尽管制造这些工具的人的骨头早已荡然无存，但远古时代的石头工具却保存了下来。