一种硬的、致密的、黑色的火山岩。它主要由斜长石、辉石和橄榄石组成，外表经常很光滑。
A hard, dense, dark volcanic rock composed chiefly of plagioclase, pyroxene, and olivine, and often having a glassy appearance.
波士顿狗：一种原产于新英格兰的小狗，是牛头和牛头犬的杂交品种，具有光滑的、有斑纹的或黑色的带白斑的皮毛。
Boston terrier: any of a breed of small dogs originating in New England as a cross between a bull terrier and a bull dog and having a smooth, brindled or black coat with white markings.
波士顿狗：一种原产于新英格兰的小狗，是牛头和牛头犬的杂交品种，具有光滑的、有斑纹的或黑色的带白斑的皮毛。
Boston terrier: any of a breed of small dogs originating in New England as a cross between a bull terrier and a bull dog and having a smooth, brindled or black coat with white markings.
应用推荐