As well as learning English, we should be aware of the cultures of many countries in order to be able to communicate more effectively.

effectively 是形容词 effective（有效的）加上后缀 -ly 构成的副词形式。effective 来自动词 effect（产生效果），加上形容词后缀 -ive 表示"能产生效果的"。 -ly 是常见的副词后缀，表示"以...方式"。effectively 意思是"有效地"，指用能够产生预期效果的方式做某事。