The sample is chosen so that after, say, one hour, there stands a fifty-fifty chance of a decay occurring.
放射性样品选择得很巧妙，假使一个小时之后，衰减的可能性为五十比五十。
According to evolutionary anthropologists, babies of the earliest humans had a fifty-fifty chance of coming out facing backwards.
根据人类进化学家，人类早期时候的婴儿生出来是有二分之一的可能性是倒着的。
Well, Yeal. According to evolutionary anthropologists, babies of the earliest humans had a fifty-fifty chance of coming out facing backwards.
根据人类进化学家，人类早期时候的婴儿生出来是有二分之一的可能性是面向后面的。
Fifty years ago, the chance of a baby (particularly a boy baby) surviving depended on its weight.
50年前，婴儿（尤其是男婴）存活的机会取决于其体重。
Fifty years ago, the chance of a baby (particularly a boy baby) surviving depended on its weight. A kilogram too light or too heavy meant almost certain death.
五十年前，婴儿(特别是男婴)存活的关键取决于体重，轻一公斤或重一公斤都意味着必死无疑。
Fifty years ago, the chance of a baby (particularly a boy baby) surviving depended on its weight. A kilogram too light or too heavy meant almost certain death.
五十年前，婴儿(特别是男婴)存活的关键取决于体重，轻一公斤或重一公斤都意味着必死无疑。
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