arbitrary用法 词汇精选：approximately的用法和辨析

词汇精选：approximately的用法和辨析  

一、详细释义：,adv.,近似，大约，近乎,例句：,The plane will be taking off in approximately five minutes.,飞机大约五分钟后就起飞。,例句：,The journey took approximately o weeks.,旅行大约用了两周。,二、词义辨析：,almost,nearly,about,approximately,around,roughly,这些副词均有“大约，差不多”之意。almost指在程度上相差很小，差不多。nearly与almost含义基本相同，侧重指数量、时间或空间上的接近。about常可分almost和nearly换用，但about用于表示时间、数量的“大约”时，实际数量可能多也可能少。approximately多用于书面语，指精确度接近某个标准以致误差可忽略不计。around多用于非正式场合，常见于美国英语。roughly指按精略估计，常代替about。,三、参考例句：,The journey took approximately o weeks.,旅行大约用了两周。,You respire approximately 21,666 times a day.,人每天约呼吸21666次。,Per square kilometer approximately has 200 residents.,每平方公里大约有200居民。,The journey took approximately seven hours.,旅程大约花了七个小时。,The journey should take approximately o hours.,这次旅行竟然用了近两个钟头。,The asthenosphere corresponds approximately to the low-velocity zone.,软流圈，大体上相当于低速带。,Approximately half of these children are in school.,这些儿童中约一半在学校学习。,Approximately $150 million is to be spent on improvements.,大约1.5亿美元将用于作出改善。,The plane will be taking off in approximately five minutes.,飞机大约五分钟后就起飞。,The mixture is allowed to hydrate for approximately 3 minutes.,混合物进行水合反应约3分钟。