Circulus venosus halleri
[医] 乳晕静脉环
🧩 词语组成解析
[医] 环, 圈
[医]静脉的
🗣️ 情景例句
How come I wasn't told?
你怎么没有听说？
Is that right?
那样对吗？
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。