极光的

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。

"Sucrose (C12H22O11) is a disaccharide; hydrolysis, by the enzyme invertase, yield s "invert sugar"(so called because the hydrolysis results in an inversion of the rotation of plane polarized light), a 50:50 mixture of fructose and glucose, its two constituent monosaccharides."

蔗糖(C12H22O11)是双醣；由转化水解后产生转化糖(名称是因为水解产物会将偏极光的平面反转)，果糖和葡萄糖各半，这是两种单醣成份。

"Sucrose (C12H22O11) is a disaccharide; hydrolysis, by the enzyme invertase, yields "invert sugar"(so called because the hydrolysis results in an inversion of the rotation of plane polarize d light), a 50:50 mixture of fructose and glucose, its two constituent monosaccharides."

蔗糖(C12H22O11)是双醣；由转化水解后产生转化糖(名称是因为水解产物会将偏极光的平面反转)，果糖和葡萄糖各半，这是两种单醣成份。

"Sucrose (C12H22O11) is a disaccharide; hydrolysis, by the enzyme invert ase, yields " invert sugar"(so called because the hydrolysis results in an inversion of the rotation of plane polarized light), a 50:50 mixture of fructose and glucose, its two constituent monosaccharides."

蔗糖(C12H22O11)是双醣；由转化水解后产生转化糖(名称是因为水解产物会将偏极光的平面反转)，果糖和葡萄糖各半，这是两种单醣成份。

"Sucrose (C12H22O11) is a disaccharide; hydrolysis, by the enzyme invertase, yields "invert sugar"(so called because the hydrolysis results in an inversion of the rotation of plane polarized light), a 50:50 mixture of fructose and glucose, its two constituent monosaccharides."

蔗糖(C12H22O11)是双醣；由转化水解后产生转化糖(名称是因为水解产物会将偏极光的平面反转)，果糖和葡萄糖各半，这是两种单醣成份。

The cusp is responsible for the famous auroras that grace high latitudes.

尖端结构是形成著名的极光的原因，而极光的出现让高纬度的地区更加明亮。

This phenomenon is similar to how solar flares develop on the Sun and is even a mechanism for creating Earth's auroras.

这个现象与太阳耀斑爆发类似，也是地球极光的产生原理。

The auroras were unexpected because the initiating Sun has been unusually quiet of late.

因为太阳最近十分平静，因此极光的出现十分出人意料。

So the next time you long for the romance of the northern lights, switch on a fluorescent lamp!

所以下次你为极光的浪漫而久久守候时，打开日光灯吧！

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。