Answer:
Conducting a fair test is one of the most important ingredients of doing good, scientifically valuable experiments. To insure that your experiment is a fair test, you must change only one factor at a time while keeping all other conditions the same. Scientists call the changing factors in an experiment variables.
I think that Aunt Imogen realized that she likes what she does. I mean that is good to be an aunt for her and she doesn't need more.
Mandarin, Arabic, Japanese - I would say languages with more complicated characters are harder..
Answer:
Claro, ¿con que palabras necesitas ayuda?