Yankeedom
n. 美国, 美国佬, 美国人, 扬基国
🗣️ 情景例句
I'm fresh out of college.
我刚从大学毕业。
I have an interview next week.
我下周要参加考试。
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。