arduous
01
艰巨的, 费力的
requiring so much effort, mostly physical, that will cause exhaustion
例子
Preparing for the marathon proved to be an arduous training routine.
为马拉松做准备被证明是一种艰苦的训练常规。
02
艰巨的, 艰苦的
requiring a lot of mental effort and hard work
例子
Building a successful business from the ground up is an arduous endeavor that involves overcoming numerous obstacles and setbacks.
从零开始建立一个成功的企业是一项艰巨的努力，需要克服许多障碍和挫折。
词汇树
arduously
arduousness
arduous
