[填空题]
The pendulum in a grandq )wev,lv +b)w k14ajsfather clp syx vwtyh z5hyo (6(8qt7f1c7li :3dock is made of brass and keeps perfect time at 17 t 18h 3fx5qcz6dyptyhl io7w(v7:sy( $^{\circ} $ C. How much time is gained or lost in a year if the clock is kept at 25 $^{\circ} $ C? (Assume the frequency dependence on length for a simple pendulum applies.)$\approx$ min(Round to the nearest integer)