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       五光十色、千姿百态、瞬息万变的极光,是自然界中最漂亮的奇观之一。它常常出现在南北半球的高纬地带(主要在南极区和北极区),是人们能用肉眼看得见的唯一的高空大气现象。因此人们对极光“情有独钟”。
      现代科学研究认为,极光的形成一方面与地球高空大气和地磁场的大规模相互作用有关,另一方面又与太阳喷发出来的高速带电粒子流有关,这种粒子流通常称为太阳风。它们是形成极光必不可少的条件。具备这些条件的太阳系其他行星,如木星和水星,它们的周围,也会出现极光。    

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Crossroads International

    How does crossroads work?

    Crosswords is a resource network. We take goods Hong Kong doesn't want and give them to people who badly need them. We collect those goods and give them out in the welfare agencies in Hong Kong, Mainland China, elsewhere in Asia, Eastern Europe and Africa____

    Who do we help?

    ____ They are grass-root groups who have seen a need and tried to meet it. They can't get the job done without backup, though, so our task is to help them do their task. Our warehouse (仓库) is full of goods, from computers to high chairs, clothing to books, cupboards to dining sets. They send us a list of their needs and we try to match it with the resource we have in stock.

    ____

    Crossroads itself also operates on a low budget. We do not buy the goods we send. They are donated. Similarly, rather than raising funds for freight (货运), we ask transport companies to donate their services____Even our full-time staff work on a voluntary basis.

    What can you do?

    ____ While we receive large quantities of goods and there is never a short supply of requests for them, we are always in need of hands to help sort and prepare them for shipping. If you are volunteering regularly, we can offer work in some of the categories, some of the time.

A. What do we need?

B. How do we operate?

C. So Crossroads is just that: a Crossroads between need and resource.

D. Nobody in our organization receives a salary.

E. One resource that we are always in need of is people.

F. welfare agencies we help do not run on large budgets.

G. All volunteer work is done at our warehouse.