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1·John grinned boyishly.

约翰孩子气地咧嘴一笑。《柯林斯英汉双解大词典》

2·Championing the cause of the solitary artisan comes naturally to Kalin, a boyishly ambitious Nonconformist who wouldn't look out of place at the local skate park.

孤独的工匠的冠军事业自然而然的落到了罗布·卡林的手里——这个有点稚气的却雄心勃勃的不墨守成规者，并且在当地的滑冰公园他从来不向外看。