矢在弦上，不得不发

Explanation: Analogy had to do something to it must say something or have the time. "Tai Ping Yu Lan" Kango ninety-seven cited Jin Wang Shen "Wei": "Chen Lin as olive, grass into, was Dynasty. Ancestors suffered too much wind, the day of disease hair, lying by reading Lin, Xiran the sky, reads: 'This disease, the more I' Dynasty Ping Ye, Chen Lin said that: 'Jun Xi-oriented book early for the olive, but only solitary sin, Henai on and leaves his father peace! "Lin Tse said:' vector in the string , and had hair. "Dynasty it was love, not blame."