r. with the head foremost
r. at breakneck speed
r. in a hasty and foolhardy manner
a. 头向前的, 仓猝而用力的, 轻率的
adv. 头向前地, 猛然地, 用力地
1. She ran headlong into the room, excited to see her friends.
她急匆匆地跑进房间，兴奋地想见到她的朋友们。
2. The company went headlong into the new project without proper planning.
公司在没有适当计划的情况下匆忙投入到新项目中。
3. He dove headlong into the pool, making a big splash.
他猛地跳入游泳池，溅起了很大的水花。