This paper classifies and discusses the following different forms from different angles: forward transfer and backward transfer;
本文从不同角度讨论了顺向迁移、逆向迁移；
It is an arduous task to ensure a better life for the several hundred million people of China and to transfer it from a backward country into an international, developed and aesthetic one.
要使几亿人口的中国人生活得好，要把我们这个思想落后、设计落后的国家，建设成为国际的、成熟的、具有高度美学的国家，这是一个很艰巨的任务。
The forward compatibility backward compatibility tin whisker voids micro-voids and surface finishes were emphasized and how to avoid the lead free transfer problems were reviewed.
重点论述了前向兼容与后向兼容、锡须、空洞与微空洞、可焊性涂层以及如何避免无铅转移中出现的问题。
The rural labors in Shannxi province have got little education. And with backward structure of industries and rural enterprises, they can not transfer freely.
目前陕西省农村劳动力文化素质相对较低、产业结构滞后、乡镇企业不发达、农民竞争力下降等原因阻碍了农村剩余劳动力的转移。
A lossless polarization transfer matrix is a unitary matrix, and reciprocal forward and backward polarization transfer matrices are transposed each other.
无损耗时极化变换矩阵为酉矩阵；互易时，正、反向极化变换矩阵互为转置。
The effect of controls parameters on mass transfer enhancement under pulsatile flow with backward flow condition is investigated.
最有效的质量传递强化发生在净流动进入过渡流流域之前的中等雷诺数下；
The effect of controls parameters on mass transfer enhancement under pulsatile flow with backward flow condition is investigated.
最有效的质量传递强化发生在净流动进入过渡流流域之前的中等雷诺数下；
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