You can also mount an ext4 file system as ext3 (backward compatible), but only if the ext4 file system does not use extents (which is discussed in the performance section).
您还可以将ext4挂载为ext3（向后兼容），但前提是 ext4文件系统不能使用区段（将在性能小节对其进行讨论）。
The bed can be pulled up and down, but also rolled backward and forward with the crank to make space in the main room.
床可以拉起来了，而且还推出向后和向前的曲柄在主室的空间。
That is, after school, but also to the backward students extra lessons.
那就是放学之后还要给后进生补课。
Related technical research in foreign countries has been very mature and extensively, but the domestic research on the issue is relatively backward and also far behind the international level.
国外相关的技术研究已经很成熟且得到广泛应用，但国内在这方面的研究仍比较落后，与国际水平存在一定差距。
But with overseas compares, especially in new product development, special purpose equipment development aspect, but also relatively backward.
但与国外相比，尤其在新产品开发、专用设备研制方面，还相对落后。
Backward-facing step flow is not only a typical example of complex separated flow of fluid dynamics, but also a class of common flow phenomena in many engineering fields.
后台阶流动不仅是流体力学中复杂分离流的一个典型例子，同时也是许多工程领域中一类常见的流动现象。
The forward-backward difference can not only detect the static and motion regions but also detect the 3-2 Pull-Downed movie sequences.
对于检测到的电影序列，则进行3 2下拉恢复处理，输出电影模式的逐行扫描帧；
As for the research of tea resist-drought in China, the certain research achievement has been attained, but it is also relatively backward compared to other industrial crops.
我国在茶树抗旱研究方面，虽然已有一定的研究成果，但较其他经济作物在这一领域的研究而言还相对落后。
So, sum up the last point - after work but also as a backward students "free up classes."
所以，总结出来最后一点是——下了班还要为后进生“无偿补课”。
The lower-loading Stem with backward sealing construction not only prevents the handle form backing-out but also ensures the reliability of the scaling part of the handle.
带倒密封结构的下装式阀杆，不仅防止了阀杆脱出，而且阀杆部位的密封更加可靠。
But the company's cost management is also a traditional attention to short-term interests in the model, the cost management concepts backward, cost management methods obsolete.
可是该公司的本钱办理还处于一种传统的注重短期好处的形式中，本钱办理不雅念掉队，本钱办理办法陈旧。
But the company's cost management is also a traditional attention to short-term interests in the model, the cost management concepts backward, cost management methods obsolete.
可是该公司的本钱办理还处于一种传统的注重短期好处的形式中，本钱办理不雅念掉队，本钱办理办法陈旧。
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