草莓宝宝2006
One of the most importantreasons.
主要：main; major; mostly; principal; chief
原因：reason; cause; account; master sheet; causation
之一：among
例句：
1、One of the big reasons that we made Hong Kong our base is its in the central of Asia, its easy to get a flight to go to all the major cities in Asia in 3 or 4 hours.
做出这个决定最主要的原因之一是香港是亚洲的中心，交通非常便利，在香港乘坐飞机去亚洲其它主要城市只需3到4小时。
2、College students 'employment difficult, difficult in where? The reason is various. College students' Professional Values dislocation is one of the important reasons.
大学生就业难原因是多方面的，最主要的原因之一是大学生价值观的变迁发生了巨大的变化。
仿佛那一天
最主要的原因之一oneofthemainreasons例句：1.oneofthebiggestreasonsforthepervasiveclutterinmyapartmentisalackoftimetodealwithit.我的房间之所以凌乱不堪，最主要的原因之一是没时间收拾。2.thedamageofthecementconcretepavementarecausedbymanyreasons,oneofthemaincausesisthebrittlenessoftheconcretematerial.造成水泥混凝土路面损坏的原因是多方面的，其中最主要的原因之一是与水泥混凝土材料的脆性有关。3.fearisoneoftheprimaryreasonsthatwomenreturntoabusiverelationships.“恐惧”是最主要的原因之一。4.thebiggestsinglecontributingfactoristhatmostrunnerstrainforlongruns,notforracing.最主要的原因之一是大多数跑步者训练的是长距离，而不是比赛。
xian蝦米
主要原因 [词典] [医] material cause; [例句]他对语言的误解是引起其他问题的主要原因。His misunderstanding of language was the primary cause of his other problems
qsfenglingbb
根本原因英文：primary cause。
例句：
1、汤姆失败的根本原因是懒惰。
The primary cause of Tom's failure is his laziness.
2、不幸的是，由于这种方法未能解决通胀的根本原因，工资和价格控制最终崩溃，迄今为止受到压制的通胀再次出现。
Unfortunately, because this approach fails to deal with the underlying causes of inflation, wage and price controls eventually collapse, the hitherto-repressed inflation resurfaces.
3、但是，这些积极行动的根本原因当然不全是出于经济目的。
However, the rationale for such initiatives is not, of course, solely economic.
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