Derived forms: been at pains, was at pains, is at pains, being at pains
Type of: endeavor [US], endeavour [Brit, Cdn], strive
英语词典包含157790条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。