他们自称是法国一个公爵的后裔搿。
They claim to be descendants of a French duke .
中性兀介子的半衰期为6×？得搿？/UK>它的半衰期大约为45亿年。
The half life of the uncharged pion is 6 ×?? . It has a half-life of about 41 / 2 billion years .
搿