A variety of methods were used to gauge GDNF production, but one was uncommon and involved the novel observation of the rats' weight.
各种方法曾用于判断胶质细胞营养因子的产生，但是一个是不寻常和涉及到老鼠重量的新观察。
2
Due to its size and weight, the telescope proved to be less effective than hoped, and the last observation made with it was in 1814.
由于其尺寸和重量，望远镜没有取得期望的效果，而用它作的最后一次观察是在1814年。
3
Objective:Traction under the observation point of view, to apply a different time traction and traction weight of the treatment of nerve root type of cervical spondylosis, and observe its effect.