您要查找的是不是：
- The old trade in black ivory is on more. 昔日非洲黑奴的买卖已不复存。
- Gold, slaves and ivory were sent north. 黄金、奴隶和象牙被运送到北方。
- He found a piece of fossil of an ancient bird. 他发现一块古代鸟类的化石。
- This fossil may be over 2 million years old. 这化石可能超过二百万年了。
- The men trafficked with the natives for ivory. 这些人与土着居民做买卖以换取象牙。
- The professor lived in an ivory tower. 这个教授生活在象牙塔中。
- Can you date the fossil exactly? 你能确定这化石的确切年代吗?
- He saw he should no longer shut himself up in his ivory tower. 他认识到不应再把自己关在象牙塔里。
- His lean body is engulfed in an ivory white Afghan coat. 他瘦削的身躯裹在一件象牙色的阿富汗大衣中。
- fossil ivory 古代巨象的牙化石
- Isn't Professor Bell an old fossil? 贝尔教授真是个老顽固。
- A microscopic fossil, as of a pollen grain or unicellular organism. 微体化石一种微小的化石，如花粉粒或单细胞有机体的化石
- If we squander our fossil fuels, we threaten civilization. 如果我们浪费矿物燃料，我们就威胁文明。
- What a fine piece of ivory work! 多么好的一件象牙工艺品啊！
- His nails resemble the ivory keys of the spinet. 他的指甲象白色的琴键一样。
- The figure seems to be made out of ivory. 这人像是用象牙雕刻成的。
- The gossip tossed the mossy blossom fossil. 爱讲闲话者向上抛长满苔藓的花化石。
- They view colleges as an ivory tower. 他们把学院视作世外桃源。
- A finite list of choices; our finite fossil fuel reserves. 为数有限的选择; 我们有限的矿物燃料贮量
- The solid matter in which a fossil or crystal is embedded. 基质，脉石嵌有化石或水晶的固体物质
