Principium
n. 原理, 基本原理
🗣️ 情景例句
Mary, I'm glad you called me.
Mary，很高兴你给我打电话。
Never cackle till your egg is laid.
事竟成，才声张。
It sped downhill at the end of the race and its driver had a lot of trouble trying to stop it.
它在接近终点时，冲下了山坡，驾驶员费了好大劲才把车停下来。