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.
First of all, it's been improved. And it's bigger, although it's more expensive.
首先,它已作了改进。而且机子较大,尽管价格贵些。
You were very kind. You brought out all your jewellery and you told me I could take anything I wanted. There were so many beautiful things that it was hard to choose. And then I saw a lovely diamond necklace with a big blue stone in the centre.