来自古英语 tusc,犬牙，磨牙，来自 Proto-Germanic*tunthskaz,牙齿，来自 PIE*dent,牙齿，词 源同 tooth,dentist.拼写去鼻音化。

1. Elephants wear the tusk down faster than they can grow it.

象牙磨损的速度快于生长的速度。

2. A huge tusk decorated the wall of his study.

他书房的墙上装饰着一支巨大的象牙.

3. The narwhal's single, spiral tusk has always been a mystery.

独角鲸那独一无二的螺旋状尖角总是被视为神秘之物.

4. One tusk - --- retain good throw away bad.

一齿 ---- 保有良好的,远离坏的.

5. The important tusk of subject education is training the person with ability of literacy and humanism.

培养兼具科学和人文双重品质的人才,是赋予学科教育的重要使命.