“司空见惯”，汉语成语，“司空”是古代官名，司空见惯现在指看惯了就不觉得奇怪，比喻某事常见，不足为奇。可以翻译为“be too common to surprise people，be a common occurrence或It is quite common for...”。

例句：

这种行为在年轻人中司空见惯。

Such behaviour is common among all young people.

再过几年，在东部城市的公共场所叫卖报纸应该会成为司空见惯的事情。

Within a few years, street sales of newspapers would be common place in eastern cities．