mubu

New practice
1.问题是你无法确切知道正在发生什么。
2.什么使我们真正感到快乐？
3.长时间以来，对持久幸福感的追求一直是科学家和许多相关调查关注的目标。
4.A man of words and not of deeds is like a garden full of weeds.

Translations:
1. The problem is, you don't exactly know the going-ons.
2. What makes us really happy?
3. The pursuit of sustained happiness has long been the subject of interests for scientfic  investigations and others alike.
4. 光說不做的人猶如花園長滿雜草。