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a kind; a sort; a variety; a species
of sorts; something of a; a sort of
sort of; somewhat
これは一種の病気だと医者に言われた。
I think this is a kind of illness.
彼の言動は一種のパフォーマンスだと感じた。
I felt that his words and actions were a sort of performance.
彼は一種の天才だと言われる。
He is said to be a kind of genius.