Eliminating the three evils referred to eliminating three kinds of evils for the people, specifically referring to the tiger, the dragon, and Zhou Chu. This allusion originated from the story in Shi Shuo Xin Yu: From the Beginning, which described the young Zhou Chu's brutality and bravery, which brought trouble to the village. In addition, there were flood dragons in Yixing's water and white-fronted tigers in the mountains. They had also become existences that harmed the people. Therefore, eliminating the three evils referred to the act of eliminating these three evils in order to protect the safety and interests of the people.
The darkening of the night referred to the process of the night gradually deepening. In daily use, the phrase 'gradually darkening the night' was used to describe the process of the sky gradually darkening, indicating the period from dusk to late night. The meaning of this phrase did not refer to a completely dark night, but to the process of the sky gradually darkening.
The night was getting colder, which meant that the temperature at night was getting colder. This sentence described the feeling of the weather gradually turning cold at night.
This phrase is rather ambiguous. It could also be part of a fable or children's story where the growth of the rooster (cock) is symbolic. Maybe it represents growth in general, like how a small and weak rooster at the beginning of the story gradually becomes bigger and stronger, teaching a lesson about development or perseverance.
It could mean that someone feels they have outgrown the enjoyment of fanfiction. Maybe they used to love it when they were younger, but as they've aged, their interests have changed and they no longer find it as appealing.
I'm not entirely sure what this specific phrase means without more context. It could potentially refer to a story about a rooster growing larger, perhaps in a farming or fable - like context.
Well, in general stories, 'getting even with sister' often refers to a situation where one sibling feels wronged by the other sister and tries to make things equal again. This could be due to a variety of reasons such as a sister getting more attention, or taking something that belongs to the other. So the wronged sister might do something to regain a sense of fairness, like telling their parents about the sister's misbehavior if the sister did something bad first.