one the other hand

On the one hand, if the body doesn't have enough cholesterol, we would not be able to survive. On the other hand, if the body has too much cholesterol, the excess begins to line the arteries.

一方面，如果体内没有足够的胆固醇，我们就无法存活下去。另一方面，如果体内胆固醇过高，多余的胆固醇就会附着在动脉内壁上。

He listened in silence as Niccolini rattled on, emphasizing his remarks with one hand and steering with the other.

尼科利尼喋喋不休讲个不停，一只手比划着以示强调，另一只手握着方向盘，而他则安静地听着。

She struck a pose, one hand on her hip and the other waving an imaginary cigarette.

她摆了个姿势，一只手叉腰，另一只手夹着一支假想的香烟。

Almost everybody had a cigarette in one hand and a martini in the other.

几乎每个人都是一手夹着香烟，一手端着马提尼酒。

On the one hand they'd love to have kids, but on the other, they don't want to give up their freedom.

一方面，他们想要孩子，但另一方面，他们又不想放弃自由自在的生活。