March 26, 2014　=========
☆ professional　専門の
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We can use “professional” to describe people who do something to earn money rather than as a hobby. For example a “professional athlete” or “professional baseball player”.
There is another word, “semi-professional” which is used to describe singers, sports players, and musicians who receive some money for playing their sport or performing, but they also have an ordinary job as well. For example, “I used to play semi-professional soccer for our city team.”
Or compare “She is a professional singer” (in other words all her income is from singing) and “she is a semi-professional singer” (in other words she earns some money from singing and some from a regular job.)
Bye,
Chris