There are intermediate varieties known as cannel coal . 有一些中间性的变种，叫做烛煤。
2.
In such islands distinct species might have been separately formed without the possibility of intermediate varieties existing in the intermediate zones . 在这些岛屿上，许多特殊的物种各自分别成立，没有中间类型在中间地带存在的可能性。
