The problem of Jet Lag is one every international traveler comes across at some time.

喷气飞行时差综合症是每个乘坐国际航班旅行的人在某个时候都会碰到的问题。

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The problem of Jet Lag is one every international traveler comes across at some time .

喷气飞机时差综合症是每个乘坐国际航班旅行的人在某个时候会碰到的问题。

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But distilling tower temperature control is a typic big time-lag system, and the control of it is always a difficult problem in coak producing industry.

但由于氨塔温度控制属于典型的大时滞系统，对这种系统的自动控制一直是焦化生产控制中的一个难题。

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In the panel conversation, the lack of good networks, better use of the emerging edtech incubators, the structure of federal research funding, the lag-time between learning and tangible results, and other things surfaced as additional facets of the problem.

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