操作: to work, to operate, to manipulate...
还: also, in addition, more, still, else, still, yet, (not) yet, (surname), pay back, return...
口径: caliber, diameter of opening...
注册: to register, to enroll...
要不: otherwise, or else, how about...， either... (or...)...
足: foot, to be sufficient, ample...
没劲: to have no strength, to feel weak, exhausted, feeling listless, boring, of no interest...
悬念: suspense in a movie, play etc, concern for sb's welfare...
灭绝: to extinguish, to become extinct, to die out...
睁: to open (one's eyes)...
