Vibroseis
震动源, 震动系统
🗣️ 情景例句
He's running for the school board.
他正在竞选联合校董会董事。
Perhaps he isn't here.
也许他不在这儿。
I was not surprised to find that the machine still refused to work after I had reassembled it,
等我装完后，那台割草机仍然一动不动，对此我倒并不感到吃惊。