Pma
[化] 均苯四酸
🗣️ 情景例句
But I may not want to go to Michigan.
但是， 我可能不去Michigan。
Any time.
随时都愿意效劳。
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。