Semimajor
axis(椭圆的)半长轴
🗣️ 情景例句
Everything--the food, the music and the guests--is arranged just right.
一切安排得尽善尽美--食物,音乐,所有宾客都令人满意。
It's January the 15th, 1999.
今天是1999年1月15日。
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。