artificial ivory造句

例句与造句

1. Sorel cement as it is known has been used for grindstones, tiles, artificial stone and even artificial ivory ( e . g . for billiard balls ).
2. Sorel cement, invented in 1867, was marketed as an artificial ivory ), John Wesley Hyatt invented a composition material in 1869 called nitrocellulose for billiard balls ( US patent 50359, the first American patent for billiard balls ).
3. It's difficult to find artificial ivory in a sentence. 用artificial ivory造句挺难的