持ち切る

(1)lengthen or extend in duration or space; "We sustained the diplomatic negotiations as long as possible"; "prolong the treatment of the patient"; "keep up the good work"

(2)長さあるいは空間を広げるまたは拡張する

(3)maintain a required pace or level; "He could not keep up and dropped out of the race"

(4)必須のペースまたはレベルを維持する

(1)