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several years
数すう年間ねんかんの努力どりょくが実じつを結んむすんだ。
Years of effort bore fruit.
数すう年間ねんかんこの仕事しごとを続けつづけている。
I have been doing this job for several years.
彼女かのじょとは数すう年間ねんかんずっと連絡れんらくを取っとっていない。
I have not been in touch with her for several years.