時空穿梭

time travel

o'clock / time / when / hour / season / period

time and place / world of a particular locale and era / (physics) space-time

empty / air / sky / in vain

to empty / vacant / unoccupied / space / leisure / free time

to wear / to put on / to dress / to bore through / to pierce / to perforate / to penetrate / to pass through / to thread

to travel back and forth / to shuttle

shuttle (textiles) / to move back and fro