speak of:谈到论及
You speak of living on the lid of a volcano .你谈到在火山口上生活。
She was spoken of as a paragon of virtue .人们都说她品德完美无瑕。
My father often speaks of my grandmother .我爸爸常常提起我的祖母。
He spoke of many things at the meeting .他在会上讲了很多的问题。
Reading is the only hobby i can speak of .读书是我唯一值得一提的爱好。
speak for:
要求得到代表…讲话
She spoke for forty minutes at the conference .她在会上讲了四十分钟。
The model that you want is spoken for .你需要的那个型号样品已经被订购了。
Who is prepared to speak for the accused ?谁准备为被告辩护
I am speaking for all the workers in this firm .我代表公司全体工作人员讲话。