A tiny few have accumulated vast wealth but even that has an evanescent, almost ghostly quality.

积少能成巨大的财富，但是那也会瞬息即逝，化为无形无质。

youdao

The white shell of the HTC Ruby exudes a "ghostly" quality, which seems to explain its ability to appear and disappear at will.

ENGADGET: HTC Ruby to be dubbed Amaze 4G, come with 1.5GHz CPU and 4.3-inch display?

When he had seen her in the center of the road he had thought for an instant she was a ghost, and there was a ghostly detached quality in the way she moved, her lips crimped in that twist of self-criticism he had noticed in the car, when she had slid in beside him.

NEWYORKER: Outage