Barbotage
起泡作用
🔁 扩展释义
【医】 往返吸注[脊髓]麻醉法
🗣️ 情景例句
about five years ago.
大约五年前。
Comets to appear
彗星出现了
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。