根据对在超市内100多种瓶装水的调查，瓶装水不一定会比厨房自来水干净些或更安全。

Sentence No. 1 Evidence shows that older people who participate in lifelong learning are healthier, more active and have more social contacts.

Sentence No. 2 According to a survey made on more than 100 brands of bottled water in the supermarket, bottled water may not be cleaner or safer than tap water from our kitchen.