的确，在相对的基础上，上四年大学的回报正在接近其历史高位，但在很大程度上，(出现这种现象的原因)是针对没有大学学历的人的预期一直是走平或下跌的。
Indeed, on a relative basis, the return on a four-year degree is near its historic high. But that's largely because the prospects facing people without a college degree have been flat or falling.
1976年夏，黄金价格开始了为期四年的上扬，这四年恰逢美元走弱。
Gold's four-year rally beginning in summer 1976 happened amid a four-year dollar decline.
是的，大约四年前走的。
四年流到走自文章发表，今天的中国仍然在路上，但明显更加自信和成熟比以往任何时候。
Four years has flowed away since the article released, today's China is still on the way, but obviously more confident and mature than ever before.
不走寻常路的摄影师比斯瓦斯，为记录周遭多彩的世界，在过去四年间已自拍30多张。
The unconventional photographer has taken over 30 selfies over four years in an attempt to record the world around her in the polychrome globe.
不走寻常路的摄影师比斯瓦斯，为记录周遭多彩的世界，在过去四年间已自拍30多张。
The unconventional photographer has taken over 30 selfies over four years in an attempt to record the world around her in the polychrome globe.
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