美国人挑选垃圾食品

instead of (用…)代替…, (是…)而不是…, (用…)而不用…
例句：He has been playing all afternoon instead of getting on with his work.
他整个下午一直在玩, 没有继续工作。
come up with比得上, 赶上
例句：We shall have to work hard to come up with the other firm.
我们得埋头苦干才能赶上那家公司。

2. And most have gone bankrupt trying.

go bankrupt破产
例句：His business failed and he went bankrupt.
他的生意失败了,他也破产了。

3. Some experts believe chains serving healthful fast food will evolve once costs come down or Americans get used to the idea of ordering, and paying a bit more for, a quick lentil burger and salad instead of a cheeseburger and fries on the road.

come down (物价等)跌落
例句：The price of coal has come down this week.
本周煤价跌落下来。
get used to习惯于
例句：I get used to looking after myself.
我已经习惯于照顾自己了。