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Tổ chức Baccalaureate Quốc tế · IB Diploma · Sports, Exercise and Health Science · HL Chủ đề 6 1:08 Giọng đọc tiếng Anh · phụ đề tiếng Anh + 中文 được ghi trực tiếp
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Biên bản ghi âm
These are selected topics, not the whole syllabus, and every example is fictional.
这些是精选主题，不是完整大纲，所有例子都是虚构的。
Compare injury rates per exposure, not raw counts.
比较每单位暴露的受伤率，而不是原始次数。
Group A records 6 injuries in 3,000 athlete-hours; group B records 8 in 8,000.
A 组 3,000 运动员小时内记录 6 次受伤；B 组 8,000 小时内 8 次。
B has the larger count, but divide by exposure: A has 2 per 1,000 hours and B only 1.
B 次数更多，但除以暴露时间：A 每 1,000 小时 2 次，B 只有 1 次。
The comparison still needs the same injury definition and recording system.
比较仍要求受伤定义和记录方式相同。
A squad of 20 players trains 10 hours a week for 12 weeks and records 6 injuries.
一支 20 人的队伍每周训练 10 小时，共 12 周，记录 6 次受伤。
Build the exposure first: 20 times 10 times 12 is 2,400 athlete-hours.
先算暴露：20 × 10 × 12 = 2,400 运动员小时。
The rate is 6 over 2,400, times 1,000: 2.5 per 1,000 hours.
受伤率 = 6 ÷ 2,400 × 1,000 = 每 1,000 小时 2.5 次。
Surveillance begins with the denominator.
监测从分母开始。
Check yourself.
自我检测。
9 in 4,500 hours is 2 per 1,000.
4,500 小时 9 次，每 1,000 小时 2 次。
3 per 1,000 beats 2 per 1,000: the smaller count is the higher risk.
每 1,000 小时 3 次高于 2 次：次数少的风险反而更高。