And the raven, never flitting, still is sitting, still is sitting.

那乌鸦并没飞去，它仍然栖息，仍然栖息。

youdao

And the Raven,never flitting, still is sitting -- still is sitting On the pallid bust of Pallas just above my chamber door;

VOA: special.2010.10.31

At the end of the poem,the man has quite clearly gone mad from grief: And the raven,never flitting,still is sitting still is sitting On the pallid bust of Pallas just above my chamber door;

VOA: special.2009.02.02

They apparently also managed to get into trouble when it went out of Bluetooth range (we could introduce them to some guys who could help with that) just flitting around in an office, so it seems there's some refinement still to be done all round.

ENGADGET: Video of Seiko Epson's flying microbot