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 two 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 two 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 two 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。