•He rarely does anything more strenuous than changing the channels on the television.他很少做比切换电视频道更费神的事。

•His doctor advised him not to take any strenuous exercise.他的医生建议他不要做任何剧烈运动。

•Strenuous efforts were made throughout the war to disguise the scale of civilian casualties.整个战争期间，政府都在煞费苦心掩饰人民的伤亡程度。