Ngbs
abbr. National Gravity Base Station 国家重力基准站
🗣️ 情景例句
about us not having dinner with the family,
对于我们无法与全家人共进晚餐一事
What did he tell you?
他告诉你什么？
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。