Arccos
反余弦
🗣️ 情景例句
Is there a convertible model available?
这里有敞篷车吗？
Cry with one eye and laugh with the other.
口不应心。
Notices forbidding the open-air drying of clothes, or the use of water points for car washing,
禁止露天晒衣服、禁止用水龙头冲洗汽车的布告