I provide this list both to illustrate the complexity of J2EE and to provide a crude map of the order in which you should proceed in learning these technologies. The important technologies are.

我提供这份清单既是为了解释J2EE的复杂性，也是为了提供一份帮助您继续学习这些技术的粗略的地图。

youdao

South Sudan, for years the largest oil producer in the region and locked in an oil dispute with Sudan, now wants to send crude out through Kenya on a pipeline to a proposed new port in Lamu (see map).

ECONOMIST: African energy