1
- the same in share or proportion; equal各半的, 对半的, 平分的：
fifty-fifty partners.
各占一半份额的合伙人。
1.1
- used to refer to one of two possibilities that are equally likely to happen（事情发生的可能性）几率（或概率）各半的：
he has a fifty-fifty chance of surviving the operation.
他能否挺过这个手术的几率的一半对一半。
- in two amounts or parts that are the same in size; equally各半, 对半地; 相等地：
they divided the spoil fifty-fifty.
他们平分了赃物。