12.18 approachable

1) 翻译：尽管她是一线明星，她依然很接地气。

Despite being a superstar, she is still approachable. 

更好的表达：maintain an approachable demeanor

2) Although he is a professor with a wealth of knowledge, he remains approachable and down-to-earth

3) 其他积累：

The text is approachable, coping well with quite complicated subjects.

这篇课文把相当复杂的主题讲述得深入浅出、通俗易懂。