Point projection
[计] 点投影
🧩 词语组成解析
projection
[prə'dʒekʃən]
n. 预测;规划，设计;[心]投射;突起物;
🗣️ 情景例句
Good luck.
祝你好运。
I will have done it by the time you come back.
在你回来之前，我会做完它。[将来完成时，表示将完成…，会做完…]
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。