to .in
He told the key to his success in winning the first prize.
the key to 通往XXX的钥匙,key 比较特殊,要用to,如 the key to the door
success in doing sth 成功做某事
to .in
He told the key to his success in winning the first prize.
the key to 通往XXX的钥匙,key 比较特殊,要用to,如 the key to the door
success in doing sth 成功做某事