Dredgers
n. 挖泥船( dredger的复数形式 ); 撒粉器
🗣️ 情景例句
Hey, what did you do on your trip?
嗨，旅游时玩的怎么样？
You can tell.
看得出来。
Once the existence of this wave-length had been discovered,
一旦这种波长的实际存在被发现，