🧩 词语组成解析
sloping
['sləʊpiŋ]
adj. 倾斜的，有坡度的;
v. 有斜度( slope的现在分词 );悄悄地走;潜行;
trough
['trɔ:f]
n. 水槽，食槽;低谷期;[航]深海漕;[气]低气压槽;
🗣️ 情景例句
What did you see on your vacation?
在假期中都看了些什么？
Could I have the bill, please?
请把帐单给我好吗？
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。