These weaknesses negated his otherwise progressive attitude towards the staff.这些缺点抵消了他在对待员工上还算开明的态度。

This negated all the good that we had achieved.这使得我们已经取得的一切好处都化为虚无。

To negate the results of elections would only make things worse.否定选举的结果只会使事情变得更糟。