Elaps
[医] 珊瑚毒蛇属
🗣️ 情景例句
Have you ever done any correspondence work?
你有处理文书的经验吗？
He that knows nothing, doubts nothing.
无知就无疑。
and by measuring the time interval between the taps and the receipt of the echoes, the depth of the sea at that point can be calculated.
测出回声间隔的时间，便可算出该处海洋的深度。