L.利用与浪费 - 用于/被用于/作为 L1-5

(时间精力)用于

• contribute time/effort to
• commit/devote/dedicate ... to
• spend ... on
  
• spend ... with
• take time/energy/effort to do
• take up; occupy
• fill time

引导用于

• channel ... into
• direct ... to/toward

用于

• represent an attempt
• Music has been used to inspire soldiers and to celebrate civic identity in every culture and time, but when the characteristic modern ensemble of brasses, winds, and percussion first appeared in Europe in the late eighteenth century, it represented an attempt to imitate the sounds of Turkish military music.
• serve as vehicles for
  
• in fact, during their golden age in the first half of the twentieth century, musicals served partly as vehicles for popular songs.