1. Ethanol is more effective at a concentration of 50-70 per cent;
    乙醇的浓度为50%至70%时比较有效，

2. Eight patients have survived for over five years, and 70 per cent of all Shumway´s transplant cases live for over a year.
    8位病人手术后活了五年多。百分之七十的接受萨姆威治疗的病人存活时间超过一年。

3. But most of all, you've learned what a "7.6 per cent unemployment rate" really means.
    

4. It requires 97 per cent less energy to travel the quarter of a million miles from the Moon to Earth-orbit than the 200 mile-journey from Earth´s surface into orbit!
    因此，从月球到地球的25万英里所消耗的能量要比从地球表面进入地球轨道的200英里所耗能量少97%。

5. Two months later, some more money was sent to Sam with another note: ´Only 25 per cent a thief now!´
    又过了两个月，又有一些钱送还给了萨姆，又附了一张字条："这回只是25%的小偷了！"

6. The last note said: ´I am 100 per cent honest now!´
    最后的那张字条上写道："我现在是一个100%的诚实人了！"

7. Although perhaps only 1 per cent of the life that has started somewhere will develop into highly complex and intelligent patterns,
    虽然在已经产生生命的某个地方，可能只有1%会发展成高度复杂有智力的生命形态，

8. "This doesn't reflect on your job performance; sales are down 30 per cent this month."
    "虽然这个月的销售额下降了30%，但这不影响你的工作业绩。"

9. Around 15,000 families now teach their children at home, a rise of 50 per cent from last year, according to the latest figures.
    根据最新统计，目前约有1.5万个家庭让孩子在家就学，比去年增加了50%。

10. Spirits labelled 95 proof contain only about 47 per cent alcohol.
    强度标为95的酒中含有47%的酒精。