托马斯·布拉肯医生描述了那个病例：一名45岁天主教牧师由于经常祈祷导致左膝疼痛。
Dr. Thomas Bracken describes the case of a 45-year-old Catholic priest much given to prayer whose left knee became painful.
凉鞋由于经常穿，鞋带快磨断了。
Constant use had fretted the sandal strap to the breaking point.
你的衬衣由于经常洗涤已经褪色。
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