至于我的事业，我还没有看到特别的分界点。

As for my career, I haven't got a specific cut-off point.

大学成绩具有阶段性，第三或者第四学期为分界点。

The university result has stages, and the third or fourth semester is the demarcation point.

春秋分日甚至不是二至日(夏至：一年中光照最强烈的时候。冬至反之)的中分界点，她补充道。

The autumnal equinox and vernal equinox aren't even midway between the solstices, which are the days of greatest and least light of the year, she added.

然而，作为这项制度的规范对象，古代官员们对丁忧的态度却以唐末宋初为分界点，发生了了明显的转变。

However, the attitude of the officials in the ancient times, the subjects of this regulation, to this system underwent drastic change at the end of Tang Dynasty and beginning of Song Dynasty.