我们大约中午十二点到达。
wǒmen dàyuē zhōngwǔ shíèr diǎn dàodá 。
We will arrive at about noon, around twelve o'clock.
这个问题大约需要一小时来解决。
zhègè wèntí dàyuē xūyào yī xiǎoshí lái jiějué 。
This problem will take about an hour to solve.
他的年龄大约三十岁。
tāde niánlíng dàyuē sānshí suì 。
His age is approximately thirty years old.