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многотрудный 形容词强调
Gruzovik toilsome; very arduous; very difficult
一般 formidable; laborious (medfly); difficult (MichaelBurov); very much difficult (MichaelBurov); operose
Gruzovik, 过时/过时 formidable
罕见/稀有 tiresome (Баян); arduous (Супру)
многотрудно 副词
一般 drudgingly
过时/过时 operosely