Drop-out rates in some subjects are shocking: the Royal Society reckons that half of maths and science teachers leave within five years of starting their training.

有些课程，其成功培养教师的失败率大的惊人：英国皇家化学学会称，有半数的数学与物理老师在上任后的五年内辞职走人。

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Gates entered Harvard in the fall of 1973, only to drop out two years later to found Microsoft with childhood friend Paul Allen.

盖茨于1973年秋季进入哈佛大学学习，两年后辍学，与童年好友保罗·艾伦共同创办了微软公司。

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You've spent years getting to this point, so you just can't drop out now.

花了好几年才取得今天的成绩，要你现在放手谈何容易。

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In fact, the quality of education that students receive generally is poor and the drop-out rate under 12 years is up to 50 per cent in some areas.

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Such a drop-out rate has its roots in the earliest years of school, when under-performing students are pushed through the system.

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Ten years ago it started out as a drop box service - where delivery companies could leave customers' products that had been ordered from online retailers.

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