然而，这种情况也有其黑暗的一面：尽管我们取得了进步，世界上仍有一半的人口在受苦，供水服务还不如古希腊和古罗马人。

Yet there is a dark side to this picture: despite our progress, half of the world's population still suffers, with water services inferior to those available to the ancient Greeks and Romans.

youdao

本书黑暗的一面充斥在页边留白处。

This book’s dark aspects pool around its margins.

youdao

土卫八较暗的一面实在是非常的黑暗，它覆盖着土卫八正对公转的半球被认为在绕土星公转时被宇宙空间扫除了一些黑色的物质，所以它只是表面的一层不足一米的薄层。

It covers the moon's leading hemisphere - the side that faces forward as it moves in its orbit - which suggests that the black material has been swept up from space as the moon moves around Saturn.

youdao