Aciculum
足刺(多毛类)
✅ 同义词
🗣️ 情景例句
How about tomorrow?
明天怎么样？
I practiced everyday for today's golf match.
我为了今天的比赛而天天练习。
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。