Dear friends:

We are likely to criticize others, but very easily miss our own mistakes; especially in writing. I myself commit mistakes sometimes. But I am always try to avoid typo errors by checking carefully whatever I wrote before sending to my students. I don't want to give my students a bad example of being careless in handling a formal work.

When using a word processor in the computer, please check the spelling and grammar after editing, by choosing Spelling Checker and Grammar under Tools.
Alex Wu