我来胡乱翻一下.美风是彻头彻尾的乐观主义啊。

水果不仅需要阳光，也需要凉夜。寒冷的雨水能使其成熟。人的性格陶冶不仅需要欢乐，也需要考验和困难。

The nurturing of character not only needs happiness, but also test and difficulty, just as fruits need sunshine as well as cool nights when they benefit from cold rain to make them mature.