observation和observance的区别

observation:

n. 观察；监视；观察报告

The results of the experiment are all based on scientific observations.

实验的结果都是根据科学观测得来的。

observance:

n. 惯例；遵守；仪式；庆祝

We must respect religious observances in different regions.

我们要尊重不同地区的宗教习俗。