Could someone clarify these sentences for me? 1. So finds a new study that identifies six ways people with unlucky bits of DNA can stave off the accumulation of excess pounds. - The beginning of it doesn't make sense to me. 2. You can run away from your fat genes, and you can waltz right on by a hereditary risk of gaining weight. - waltz right on by? 3. She had the careworn, joyless, exhausted but it agitated look I've seen in many of my patients. This one I might've misheard. 4. In 2012, the company behind DDR — Japan’s Konami Entertainment — launched a classroom edition of its video game, which lets up to 48 students dance in unison to the same song on wireless controller mats that judge the execution of their moves. - lets up?

Is this sentence correct? Since the antiquity philosophers have been wondering what is a source of good life, happiness and contentment.

Phrasal verb "pull back" Hi, I've stumbled upon an interesting usage of the phrasal verb "pull back". here's the sentence: "All the major channels have pulled back on the coverage as it is getting repetitive." Pull back ON? Would that mean they've just kind of suspended it for a time? If it said that they have pulled back the coverage, would that mean then that they've taken it off the air completely?

What does the phrasal verb "step up" mean? What does it mean in this context? I was prouder than I can ever explain when he stepped up for that photograph to get his first medal. to step up for something. Does it mean the same as "take on something" here? Thanks!