discourse mark的用法和样例：
例句
- Following this, functions of discourse markers will be discussed in detail in Chapter three.
第三章将详细讨论话语标记语在言语交际中的功能。 - The study of discourse makers also belongs to the scope of discourse analysis, so Chapter four will deal with the coherence, which discourse markers serve in verbal communication.
话语标记语的研究也属于话语分析领域，因此第四章将讨论话语标记语在言语交际中所起的连贯作用。
