VOA慢速英语:Everyday Grammar: Make Your Writing Smoother with Transitions

coordinator – n. a part of speech that connects words, sentences, phrases, or clauses

subordinator – n. a word that introduces a surordinate clause, a group of words that cannot stand alone as a sentence.

semicolon – n. a punctuation mark (;) indicating a pause, typically between two main clauses, that is more pronounced than that indicated by a comma

gerund – n. the –ing form of a vern that functions like a noun

sophisticated – adj. having or showing a lot of experience and knowledge about the world and about culture, art, literature, etc.