my father is an engineer. he works very hard.

　　once i asked my father what the secret of success was. he didnt say a word, but wrote a few words on a piece of paper and handed it to me. i looked at the paper. ()n it was written: a=

　　+y+z.

　　what does it mean?i asked.

　　a means success, eplained my father. means hard, y means good ways, and z means you must stop talking and start to work.

　　thats right. from then on, i tried my best to be better.