极光

While scientists know the cause of the aurora, exactly how it affects earth is still in question.

虽然科学家知道了极光的成因，但是它究竟如何影响地球仍是一个疑问。

Because the intensity of light in an aurora is low, it can be seen only at night.

由于极光的光强度很低，所以只能在夜间才能看见。

For starters, on this Friday morning in August 2002, no intense auroral activity was expected at all.

但更令人意外的也许是，在某些地区，看见了这个带著绿色线状结构的极光。

This high result was interpreted to reflect previous auroral activity.

这一高结果可以用以前的极光活动来解释。

It is possible that the auroral oval shifts southerly and hence produces this effect in winter .

这可能是由于冬季极光卵向南偏移造成的。

Although no general methodology is mentioned, I hope that the reader will learn about the history of progress in auroral science and examples of dealing with the controversies.

虽然没有一般的方法学被提及，我希望读者将在处理争论的极光的科学和例子方面了解发展的历史。

The auroral absorptions are related to the solar activity .

极光吸收与太阳的活动性密切相关。

Since 1978, NOAA's polar-orbiting satellites have monitored the energy flux of particles into the auroral zones.

年以来， NOAA 的极轨卫星一直对进入极光区的粒子能量通量进行检测。

It can also decode well under other noise, QSB, QRM, flutter and auroral conditions.

其他的噪声下，它也能够很好地解码：QSB，QRM，扑动和极光的条件。

The above image was taken in an effort to capture the sense ofwonder one gets when watching an auroral display.

拍摄上面这张影像的目的，在於试著捕捉人们看见极光时的惊艳之感。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。