on the down grade

This paper discusses the security problems of how to ensure air-filled time in periodic train braking and low-speed running problem for heavy haul trains on the long heavy down grade.

对长大下坡道区段开行重载列车如何保证周期制动时列车制动机充风时间及低速慢行等安全问题作了论述，提出了相应的验算评价方法和机车动力制动故障时安全运行的应急措施。

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It's much more difficult to be on the up grade than on the down grade.

走上坡路比走下坡路要难得多。

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Their marriage is on the down grade.

他们的婚姻关系每况愈下.

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Soon after she was born, she came down with polio, which made her drag her left leg. On top of that, she'd transferred to our school at the end of fifth grade.

由于出生不久便得了小儿麻痹，左腿有一点点跛，并且是转校生（岛本来我们班是五年级快结束的时候）。

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Although the period of America which Dickinson lives in breaks several wars, the whole stage is rising. On the contrary, the Mid-Tang Dynasty is on the down grade, which is full of dark.

狄金森生活的美国虽有战争，但整体是处于上升阶段，李贺所生活的中唐社会黑暗，在走下坡路。

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Business is on the down grade.

生意衰败.

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The speed of a railway train is often much faster on a down grade.

火车下坡时速度通常快很多.

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Security Problems of Operation Heavy Haul Trains on the Long Heavy Down Grade

长大下坡道区段开行重载列车的安全问题

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His career has been on the down grade.

他的事业已经走下坡路了.

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