费力的

Learning to play the piano requires effortful practice every day.
学习弹钢琴需要每天进行刻苦的练习。
The scientist spent years conducting effortful research to discover a new species of bird.
这位科学家花了数年时间进行艰苦的研究，以发现一种新的鸟类物种。
After months of effortful training, she finally ran her first marathon.
经过数月的努力训练，她终于完成了她的第一个马拉松比赛。
He put in an effortful attempt to clean up the polluted river.
他付出了巨大的努力来清理被污染的河流。
It was an effortful journey to climb to the top of the mountain.
爬上山顶是一段艰难的旅程。
She made an effortful decision to quit smoking for good.
她做出了一个艰难的决定，永远戒烟。
The team had to work with effortful precision to complete the complex project on time.
团队必须以努力的精确度工作，才能按时完成复杂的项目。
After much effortful consideration, he decided to accept the job offer.
在经过一番艰苦的考虑之后，他决定接受这份工作。
She gave an effortful performance in the lead role of the play.
她在该剧中的主角角色中表现出色。
The athlete trained with effortful intensity to prepare for the upcoming competition.
运动员以极大的努力强度进行训练，为即将到来的比赛做准备。