concentrate 専念する

March 17, 2015 =========
☆ concentrate 専念する
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OK, so I guess I should have known that my new laptop would not be “easy” at first! I have spent most of today concentrating on getting Windows 10 working on it!! It was supposed to come with it already installed, but it wasn’t so I did it… but then there were “glitches” and various little things that didn’t work. I watched YouTube videos, did more researching on help sites, and my head hurts from concentrating so much!!
Have you ever had a headache from concentrating so much? What were you concentrating on? Why did you have to concentrate so hard? Was it an examination or something important that you must not fail?
Bye,
Chris