In my opinion, a PhD program takes years to finish but may leads to no degree at the end after spending these years on it. It is not a natural ability we born with, but an investment that not everyone can achieve. On the other hand, anyone could earn a living by doing hard labors, which is an ability every of us was born with. Therefor, I think mental work deserves to be paid better than physical labor.
我修改了个别不符合英语习惯的说法。比如“这是一个投资, 不是人人都成做得到的, 这不是天生的能力.”在英语中最好倒过来说,因为英语习惯的语序是:not ... but... 不是...而是...
还有,“不是人人都成做得到的”,语气不够强硬,不符合英语的习惯。英语在正式场合多用确定性的句子,而不用有些模棱两可的说法。换成“只有少数精英通过多年的努力和训练才能做到”
It is not an natural ability we born with, but an investment that can only be achieved by a few elites after years of hard working and training..
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