Talking too rapidly;
语速太快;

Speaking in a monotone;
声音单调；

Using too high a vocal pitch;
声音尖细；

Talking and not saying much;
“谈”得太多，说得太少；

Presenting without enough emotion or passion;
感情不充分；

Talking down to the audience;
对观众采取一种居高临下的姿态;

Using too many "big" words;
夸张的词语使用得太多；

Using abstractions without giving concrete examples;
使用抽象概念而不给出事例加以说明；

Using unfamiliar technical jargon;
使用别人不熟悉的技术术语；

Using slang or profanity;
使用俚语或粗俗语；

Disorganized and rambling performance;
演讲无组织，散乱无序；

Indirect communication i.e. beating around the bush；
说话绕弯子，不切中主题；