傅科摆

Foucault's pendulum

surname Fu

(bound form) instructor / (literary) to instruct / to attach / to apply (makeup etc)

branch of study / administrative section / division / field / branch / stage directions / family (taxonomy) / rules / laws / to mete out (punishment) / to levy (taxes etc) / to fine sb / CL:個|个[ge4]

to arrange / to exhibit / to move to and fro / a pendulum