These days we often hear that…

(1) It is common that

提出论题

(2) Why does such circumstance occurin spite of socialprotects? For one thing

说明现状

(3) For another

理由一

(4) What is more,since

理由二

(5) It’s natural that

理由三

(6) To solve the problem is not easy at all, but is worth trying.We should do something such as

理由三引起的后果