adj.草率的，轻率的，急速的，头向前的，险峻的
adv.轻率地，头朝前，莽撞地，慌慌张张地

The children dashed headlong into the swimming pool, laughing and splashing.
孩子们毫无顾忌地冲进游泳池，欢笑着溅起水花。
He charged headlong into the project without considering the risks.
他不顾一切地投入到项目中，没有考虑可能的风险。
The car skidded headlong off the road due to the icy conditions.
因为路面结冰，汽车失控头朝下冲出了道路。
In his excitement, he plunged headlong into the adventure without hesitation.
在兴奋中，他毫不犹豫地一头扎进了冒险。
She dove headlong into her studies after a long vacation, determined to catch up.
长假过后，她全身心投入学习，决心迎头赶上。
His enthusiasm was so infectious that the team charged headlong into the competition.
他的热情如此强烈，以至于整个团队都全力以赴地投入到比赛中。
The investors rushed headlong into the cryptocurrency market, hoping for quick profits.
投资者们一头扎进加密货币市场，期待快速获利。
The explorer plunged headlong into the dense jungle, searching for the lost city.
探险家一头扎进茂密的丛林，寻找失落的城市。
After years of hard work, she finally raced headlong towards success.
经过多年的努力，她终于全力冲刺向成功。
The young athlete ran headlong into the finish line, crossing it triumphantly.
年轻运动员径直冲向终点线，胜利地跨过。