当生活很艰难，你想要放弃的时候，请记住，生活充满了起起落落，如果没有低谷，那站在高处也失去了意义。When life gets hard and you want to give up, remember that life is full of ups and downs, and without the downs, the ups would mean nothing.我真的不理解这到底有什么意义，简直是愚蠢透顶。I don�...
本文研究了一种新型行星传动 —— 滚锥齿超环面行星蜗杆传动.The paper researches a new type mechanical transmission mechanism - the Rolling cone - type toroidal drive.'环'.''面,环形圆纹曲面圆圈形成的超''.'环'.''面; 具...
The fractal interpolating fitting curves are well consonant with the observation data.下沉量和水平移动量的分形插值拟合曲线与实测岩移数据吻合较好.Models of Stop, Nasal , and Fricative Consonant Production.停止式 、 鼻音式和摩擦式的子音产生模型." N " is a syllabic cons...