A hard black form of lignite that takes a brilliant polish and is used in jewellery or ornamentation. 一种黑色硬质的褐煤,表面亮滑,用于珠宝和装饰。
Germans had hard black bread and, if lucky, sausage and butter. 德国人则是黑硬型面包,如果运气够好,会有香肠和黄油。
Ebony is a hard black wood. 黑檀树种黑而坚硬树木。
A trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder. 一种三价非金属元素,或呈坚硬的黑色晶体状,或呈黄色或棕色粉末状。
A fortnight later, when the snow had gone, and had been followed by a hard black frost, she took advantage of the state of the roads to try the experiment. 两个礼拜以后,风雪过去了,接着又是一场严酷的霜冻,她就利用道路冻住了的时候去进行这次拜访。