Percolumbic acid
[化] 过铌酸
🧩 词语组成解析
🗣️ 情景例句
Simply this.
简单说来是这样的。
Have you had breakfast already?
你已经吃了早餐吗？
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。