Rays ultimes
[化] 住留谱线
🧩 词语组成解析
n. 射线；[俚]日光浴；光线（ray的复数）
🗣️ 情景例句
His personality left a deep impression on us.
他的人品给我留下了深刻的印象。
That's awful.
那太可怕了。
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。