空中交通管理

The airlift was not just the only time in history when large quantities of coal have been delivered by air. It also brought leaps in air-traffic control and cargo handling. It even featured a primitive but effective electronic data interchange, jury-rigged from telex machines.

这次空运，不仅仅是历史上唯一一次空中运输大量煤炭，还给航空交通管制和货运管理带来了飞跃，甚至还用电报机临时搭建起了简单粗糙，但行之有效的电子数据交换系统。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。