It's about this high.
大约有这么高。
There was much discussion about the reasons for the failure.
就失败的原因进行了大量的讨论。
The population is increasing at about 6% per year.
人口以每年约6%的速度增加。
It's only human nature to be worried about change.
对变革有忧虑不过是人之常情。
We estimated it would cost about 5 000.
我们估计要花费大约5000欧元。