Healthwise, the Northern Hemisphere and the Southern Hemisphere outside of sub-Saharan Africa are more alike than different.

以健康问题而言，球与南球（非洲撒哈拉沙漠以南除外）的相似点多于相异点。

Recently northern global climate was controlled by high (low) base state, low (high) decadal and interannual variability of SOI(NAOI).

近球处于SOI基本态及代变率，NAOI基本态及代变率的慢变过程下。