As a result I have become more observant .

因此，我本人也变得更加遵守纪律。

As parents and teachers, we need to be more observant and accessible.

作为家长和教师，我们需要更多的观察和访问。

After that experience, I learnt to be more observant , and a lot quieter.

有过了那样的经验后﹐我学习到了多观察而且我也安静了很多。

You should have been more observant when he stared at you; it was certainly a red flag.

当他盯视你的时候一定是大事不妙, 那时你就应该提高警觉了.