书到用时方恨少,
事非经过不知难。
——《增广贤文》
window.fkp = "d2luZG93Lm9ua2V5Zm9jdXMoIkRRQWNwR3VJSTdMb1lYSlNnR3NQZVMxN2R0VUh0MVJoOTh5R1B3ZThaWXBKMDJ1K3ZPbzNpd1FYSjZPdFVFUUpWN01Edks4VWFR">
window.fkp = "d2luZG93Lm9ua2V5Zm9jdXMoIkRRQWNwR3VJSTdMb1lYSlNnR3NQZVMxN2R0VUh0MVJoOTh5R1B3ZThaWXBKMDJ1K3ZPbzNpd1FYSjZPdFVFUUpWN01Edks4VWFR">