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1·The backward area has achieved self-sufficient in grain.

这个落后的地区在粮食方面已能自给。

2·Unconsciously, they arrived at a very poor and backward area.

不知不觉间，他们走到一个贫穷落后的地区。

3·B: Two hours.That area is a little backward.

两个小时。那地方有点团塞。

4·Backward Compatibility is an area we where have focused much attention.

向后兼容性是我们非常关注的领域。

5·In reasoning mechanism, two kinds of strategy: heuristic forward and backward reasoning method are adopted, and blackboard structure which is a common dynamic data area being applied.

在推理机构中，采用两类策略：启发式正向和反向推理方法，并利用黑板结构作为公共动态数据区。

6·This area is still backward; there are no railways and no electricity.

这个地区仍然很落后；没有铁路，没有电。

7·Shaanxi locates in the less developed area of economy in China, so the economy and culture is relatively backward.

陕西省处于我国经济欠发达地区，经济、文化相对落后。

8·To complete this maneuver fly, backward to a hover above the landing area.

后退飞行至降落区的上空保持倒飞停悬，即完成此动作。

9·There are 785 collective coal mines of little scale in Xinjiang area. The backward mining and management practices there have resulted in waste and damage of coal resources.

新疆集体煤矿785个，规模小，采煤方法落后，管理水平低，资源破坏浪费严重。

10·The backward diffraction on the shadow area of aircraft and its components having low radar-cross-section (RCS) is one of the main contributions of their RCS.

阴影区的后向绕射是低散射截面飞行器和部件rcs的主要贡献之一，有效地抑制它可以进一步地减缩rcs。