4. Learn something about "language learning". 4.掌握学习语言的技巧。
Remember that language is a complex system of meaningful sounds organised with a series of rules (grammar).
要记住，语言是一个按规则（语法）组织起来的具有意义的声音的复杂系统。
Every student has to study enough pronunciation, grammar and sentence structure to understand this!
每一个学生必须通过学习足够的发音、语法和句子结构知识来理解它。
