うん

「コーヒーのお替わりいる？」「うん、ぼくのは少なめ、弟のには多めについでね」

"Do you want another cup of coffee?" "Sure, make mine on the small side but be generous with my brother's."

う〜む、相貌から判断するに上海からか。

Hrmmm, to judge from their looks they might be from Shanghai.

「軽くならいいけど」「うむ、では金的と目潰しは有効にするか？」

"If it's a light workout, OK." "Right, so will we allow crotch-kicking and eyeball crushing?"