Echosounding
音响测深法
🗣️ 情景例句
Neither can you.
也不能入睡。
What is your part's name?
对方的姓名是什么？
Soon the hobby leads to travel, perhaps to a meeting in another town, possibly a trip abroad in search of a rare specimen, for collectors are not confined to any one country.
用不了多久，有这种爱好的人便开始旅行，也许是去另一个城市参加会议，也可能是出国寻找一件珍品，因为收藏家是不分国籍的。