lightn.光；光线；灯；打火机；领悟；浅色；天窗adj.轻的；浅色的；明亮的；轻松的；容易的；清淡的v.点燃；变亮；照亮adv.清楚地；轻便地light damp光衰减

1. It is very important to speed up the utilization of NGL and light hydrocarbon for the development of ethylene industry.
   因而加快凝析油和轻烃的利用对乙烯工业的发展具有重要意义。