2. sinful   adjective   

原句: You can mix up your healful and sinful choices.

意思: morally wrong or evil

字源: Old English synfull (see sin, -ful). 

例句: It is sinful to lie.



3. catch on   phrase   

原句: This [healthy cruising] is really something that's catching on.

意思:
a. to become popular or fashionable
b. to understand sth 

例句:
a. He invented a new game, but it never really caught on.
b. He is very quick to catch on to things.



4. conscious   adjective   

原句: Said Randi Butcher, a 43-year-old health-conscious cruiser.

意思: being particularly interested in sth

字源: late 16th cent. (in the sense ‘being aware of wrongdoing’): from Latin conscius ‘knowing with others or in oneself’ (from conscire ‘be privy to’) + -ous. 

例句: They have become increasingly health-conscious.



5. craze   noun   

原句: Group-buying websites—Groupon, LivingSocial and dozens of smaller ones—are the latest craze among price-odsessed consumers and an evolution of social media and shopping.

意思: an enthusiastic interest in sth that is shared by many people but that usually does not last very long; a thing that people have a craze for

字源: late Middle English (in the sense ‘break, produce cracks’): perhaps of Scandinavian origin and related to Swedish krasa ‘crunch’. 

例句: Doctors warned of the latest drug craze to sweep America.