Arcsecant

🗣️ 情景例句

Yes, Sam?
什么事 ,Sam?
A colt you may break,but an old horse you never can.
小驹犹可练,老马最难驯。
While the men had been working inside the ship, the air-line had been giving off oxygen.
当工人们的在船舱里干活时,供气管一直在排放氧气。
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