同じ - same/similar.
高校 - short for "高等学校" which means "high school".
三年生 - third grade student. In Japanese high school, seniors are called third grade students.
天才 - genius/gifted.
メカニック - the mechanic.
どんなに~でも - no matter what/how. "Don na" is usually followed by an adjective or verb. "Demo" may change to "temo" depending on the adjective or verb that comes before it.
仕事 - work/occupation/business.
大変 - difficult. You can also add "大変" in front of an adjective to emphasize the situation.
楽観的 - optimistic. Its antonym "pessimistic" is "悲観的" .
こなす - to overcome/finish/to have a good command of something.
オタク - otaku/geek/nerd/enthusiast.
度 - level/strength/temperature.
Keywords from previous MoeManga posts are as follows.