23 horses, mostly the progeny of about 18 mares大多为18匹母马所繁衍的23匹马

They would never allow their precious progeny to take risks.他们永远不会允许自己心爱的子女冒险。

Among its many progeny, the 1944 Education Act gave birth to the modern youth service.在1944年通过的《教育法案》的诸多衍生条款中, 就包括了现代青年教育服务。