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精通した / せいつうした : 1）familiar 2）versed in
精通者 / せいつうしゃ : n 1）(comp) expert (person) 2）someone in the know
精通 / せいつう : n vs 1 1）acquaintance 2）having knowledge 3）being expert 4）being versed in 5）conversant 2 6）first ejaculation P
精細管 / せいさいかん : 1）seminiferous tubule
精農 / せいのう : n 1）hard-working farmer or agriculturalist
精読 / せいどく : n vs 1）intensive reading 2）conning
精製画分 / せいせいかくぶん : 1）purified fraction
精製法 / せいせいほう : n 1）refining process
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精通した

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