n. a hard smooth ivory colored dentine that makes up most of the tusks of elephants and walruses
n. 象牙, 乳白色
a. 象牙制的, 乳白色的
1. The piano keys are made of ivory and black wood.
钢琴的琴键是用象牙和黑木制成的。
2. Many cultures use ivory to create beautiful art pieces.
许多文化使用象牙制作精美的艺术品。
3. The trade of ivory is illegal in many countries to protect elephants.
在许多国家，象牙贸易是非法的，以保护大象。