The ordinary screw jack depending on the thread self-locking action support heavy item, the structure is simple, but the transmission efficiency is low, the return trip is slow.
普通螺旋千斤顶靠螺纹自锁作用支持重物，构造简单，但传动效率低，返程慢。
Thanks to his positive attitude, Jack took action and saved his own life before he lost consciousness in the emergency room.
由于杰克的积极心态，在急诊室里他在失去知觉前采取了行动并且挽救了自己的生命。
Thanks to his positive attitude, Jack took action and saved his own life before he lost consciousness in the emergency room.
由于杰克的积极心态，在急诊室里他在失去知觉前采取了行动并且挽救了自己己的生命。
Animal control officers in Boise, Idaho took suitable action when they heard about a Jack Russell terrier caught in a tight spot, like a drainage pipe for some 19 hours.
当爱达荷州博伊西的动物管理人员听说JackRussell犬被困在某个地方的时候，他们采取了适当的措施将这只被困在排污管里19个小时的小狗救了出来。
Arsenal prodigy Jack Wilshere is unlikely to face any action for his role in Jerome Thomas' controversial Carling Cup sending off.
阿森纳队神童杰克·威尔谢尔看起来不会因为联赛杯上因为导致杰罗姆·托马斯得到了一张有争议的红牌而受到任何处罚。
Arsenal prodigy Jack Wilshere is unlikely to face any action for his role in Jerome Thomas' controversial Carling Cup sending off.
阿森纳队神童杰克·威尔谢尔看起来不会因为联赛杯上因为导致杰罗姆·托马斯得到了一张有争议的红牌而受到任何处罚。
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