approximately
单词辨析：
多用于非正式场合，常见于美国英语。也用作 around about。
She has around ten million US dollars in the bank.
她在银行里存有大约一千万美元。
Janet left here around seven o'clock.
珍妮特大约7点钟离开这里的。
表示实际数量可多可少或数值、尺寸等可大可小，也作 round about。
They left the museum at about 10 o'clock.
他们10点左右离开了博物馆。
He lives about 5 miles away.
他住的地方离这里5英里左右。
多用于书面语，强调接近精确数值、数量、时间等，误差较小。
The plane will be taking off in approximately ten minutes.
飞机大约10分钟后起飞。
He owes me approximately 400 US dollars.
他欠我大约400美元。
指按粗略估计，不强调十分接近精确数值。
There were roughly 300 people there.
那里大约有300人。
The Antarctica is a continent centred roughly on the South Pole.
南极洲是一片大致以南极为中心的大陆。
相关例句：
Approximately in one and a half hour they returned back.
大约一个半小时后他们回来了。
Simple cuboidal epithelium is a single layer of cells whose width and height are approximately equal.
单层立方上皮由单层细胞组成，细胞的宽度和高度近似相等。
At approximately 11:30 p.m., Pollard finally gave his consent to the search
大概晚上11点半的时候，波拉德最终同意进行搜查。
The conservatory measures approximately 13ft x 16ft.
温室的大小大约是13英尺乘16英尺。
This "collection area" holds approximately 20,000 imperial gallons in the bottom of each tank.
这个收集区在每个储油箱底部占据了大约20000英国加仑的空间。
China has the world's largest number of terrestial vertebrates, with a total of 1,800 species, which accounts for approximately one-tenth of the same species of vertebrates in the world.
中国陆栖脊椎动物种类居世界第一位，有1,800种，约占世界同类动物总数的十分之一。