Tetraphosphate
四磷酸盐
🗣️ 情景例句
Anything else, sir?
先生，还要别的东西吗？
You won't die for asking.
问一下又不会死。
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。