...过去害怕一个人呆在家里，现在不怕了 ? Tom used to be afraid of staying at home alone, now fear 无关的人 ? Related people 我不需要朋友，我要的是爱人 ? I do not need friends, I want is love ..
The word "bye-bye" is a duplication of "bye" and both are more likely to be used between people who are very close-say members of a family-than between more formally relatedpeople.
The explanation for this seems to be that it is valuable to place people working in related fields together.
对此的解释似乎是，把在相关领域工作的人放在一起是有价值的。
3
Like a family tree that you might use to trace back through generations of ancestors, only it's showing a family of genetically related languages instead of people.