Another recommendation to help expel the placenta has been to use what is called controlled-cord traction .
另一项一直采用的帮助排出胎盘的建议被称为控制性脐带牵引。
Even so , the snails need traction to move across the slippery surface .
尽管如此,这些螺还是需要在光滑平面上运动的牵引力。
About half of the mothers received a so-called full package of measures including controlled-cord traction .
大约有一半的妈妈接受了所谓的全套措施,包括控制性脐带牵引。
Unlike in developed markets , economies seem to have developed real traction after unprecedented fiscal and monetary stimulus .
与发达市场不同,在空前的财政及货币刺激之后,亚洲经济体似乎获得了真正的牵引力。
The scientists ruled out the possibility that geckos switch on their traction control when they feel their feet slipping .
科学家们排除了“壁虎感到脚滑时就会启用其牵引控制系统”的可能性。
But the truth is that we were looking japanese for quite a while : the fed had a hard time getting traction .
但是真相是我们在相当长的一段时期内更像是日本人:美联储很难获得牵引力。
For another , because it needs no bulky traction batteries , it would be lighter and cheaper still than an electric vehicle .
优势之二在于液氮汽车无需笨重的牵引电池,因此会比电动车更轻巧,成本也更低。
This process gives your vehicle the best chance of holding traction on the steep hill , because both the gearbox and the brakes are locking you in place .