The take away here is that filtering and recommendation are really two sides of the same coin.
2
总的来说,思想开朗的人对生活更乐观,因为他们可以看到事物的两面性。
Open-minded people tend to be more optimistic towards life in general. This ties in with the fact that open-minded people are able to “see both sides of the coin”.
3
任何事物都是两面性,……也不例外。它既有有利的一面,也有不利的一面。
Everything has two sides and...... is not an exception. It has both advantages and disadvantages.