Equatorium
行星定位仪
🗣️ 情景例句
and making it a new community center.
使它成为一个新的社区中心。
Who are you writing to?
你正在写信给谁？
it is now possible not only to locate a shoal but to tell if it is herring, cod, or other well-known fish, by the pattern of its echo.
不仅能够确定鱼群的位置，而且可以根据鱼群回声的特点分辨出是鲱鱼、鳕鱼，这是人们所熟悉的其他鱼。