埃及的

The northern and southern polar lights – aurora borealis and aurora australis – are the only parts of the magnetosphere that are visible, but it is a critical part of Earth's space environment.

地球南北两极的极光不过是磁气圈仅有的两个可见部分，虽然磁气圈并不可见，但它却是地球宇宙环境的关键部分。

Objective: To study the clinical characteristics, pathogenesis and prognosis of children with henoch-schonlein purpura.

目的：探讨儿童过敏性紫癜合并心血管损害的临床特点、发生机制和预后。