Always and again, the emphasis is on knowledge, on the certainty of understanding something, of knowing some fact and its meaning.

总是这样，重点是知识，理解事物和认知一些事实及其含义的确定性。

This should probably be an underline, since bold and italicized texts are common print emphasis techniques and may confuse the meaning of the content.

这可能应该采用下划线形式，因为粗体和斜体文本是常用的打印强调技术，使用它们可能会使内容的含义产生混淆。

Different suffixes and prefixes can be added to the word for emphasis or for its opposite - such as, "hengeilivable" meaning "very cool;" and "ungeilivable" meaning "dull, not cool at all."

不同的后缀和前缀可以加在单词上表示强调或是相反的意思——比如说，“hengeilivable”就是“非常酷”；