The mining industry must evolve to meet the demands of a changing world.
The stranger is an element of the group itself, not unlike the poor and sundry 'inner enemies'—an element whose membership within the group involves both being outside it and confronting it.
The walls of a garden should be high enough to keep the world out, but low enough to let the sky in.
花园的墙应该足够高以将世界挡在外面，但又足够低以让天空进来。
