Phlean
[化] 梯牧草果聚糖
🗣️ 情景例句
What does NATO mean?
NATO是什么意思？
You live here in the city,don't you?
你出生在这个城市吗？
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。