Screwthread
n. 螺纹
🗣️ 情景例句
Maybe.
也许是。
This alone made our nine-day trip worthwhile.
光这件事我们9天的旅行就非常值得。
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。