validity
n[U]
1 state of beinglegally acceptable (法律上)有效; 合法(性)
test the validityof a decision 验证某决定是否合法.
2 state of being logical 合逻辑; 正确(性)
question the validity of an argument, assumption 对某一论据、 假定的论点的正确性提出疑问.
What do you want to do next September? Do you have any plans?
你今年9月打算干什么?你有什么计划吗?
Of course he is. He's very successful. He's made lots of records. They broadcast a programme of his music last month on the radio. Why don't you come on Saturday? I think you'd enjoy it.