Leg cramps cause shortening of the gastrocnemius muscle in the calf.腿部痉挛引起小腿腓肠肌收缩。The days are rapidly shortening.白昼在很快缩短。The workers welcomed the shortening of work hours.工人们欢迎缩短工作时间。You can improve your writing just by shortening some of these long sentences.只要把这些长句子改短，你的文章就可以好一些。