Jim hurt his arm (while) playing tennis.
吉姆打网球时手臂受了伤。
Jim hurt his arm while [when, as] he was playing tennis.
吉姆打网球时把手臂扭伤了。
She broke ber arm while playing tennis yesterday.
她昨天打网球时跌断了手臂。
I pulled a muscle in my arm and can't play tennis today.
我拉伤了手臂的肌肉，今天没办法打网球了。
He hurt his arm playing tennis.
他打网球伤了手臂。
He hurt his arm playing tennis.
他打网球伤了手臂。
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