短語詞組短語strong timeliness 實時性強timeliness equation 時效性方程timeliness slope 時效邊坡timeliness principle 及時性原則Pickup Timeliness 收件時效absolute timeliness 絕對及時Timeliness coverage 及時接種率timeliness obstacle 時效障礙物collective timeliness 實時集 返回 timeliness