VOA慢速英语:Emojis Say Volumes Without a Word ;)

emoji - n. a small digital image or icon used to express an idea, emotion, etc., in electronic communication

icon - n. a small picture on a computer screen that represents a program or function

emoticon - n. a group of keyboard characters that are used to represent a facial expression (such as a smile or frown)

punctuation - n.  the marks (such as periods and commas) in a piece of writing that make its meaning clear and that separate it into sentences, clauses, etc.

autism - n. a condition or disorder that begins in childhood and that causes problems in forming relationships and in communicating with other people

Aspergers syndrome - n. a developmental disorder affecting ability to effectively socialize and communicate