脚: foot...
势头: power, momentum, tendency, impetus, situation, the look of things...
伸缩: to lengthen and shorten, flexible, adjustable, retractable, extensible, telescoping (collapsible)...
兢兢业业: (idiom) conscientious, assiduous...
出人意料: unexpected (idiom), surprising...
节约: to economize, to conserve (resources), economy, frugal...
提心吊胆: (saying) to be very scared and on edge...
恳切: earnest, sincere...
笑声: laughter...
频道: frequency, (television) channel...
