probably opposite

In centenarians, it's probably the opposite.

对于这些百岁老人来说或许正好相反

But probably for opposite reasons!

只是很有可能原因相反罢了！

We found that protective inoculation has a good effect in the beginning of the burst of the epidemic, but probably an opposite effect if total doses are not enough.

在交通管制方面，我们也发现对疫区的交通管制，其效果并不会比对全国的交通管制所得的效果来的差。

If you try to make any substantial change in such circumstances, results will most probably be quite opposite of what is supposed to be achieved.

若在此种情形下，妄图通过重构使代码焕然一新，结果很有可能是南辕北辙，适得其反。

I wanted to impress them but probably had the opposite effect.

我想给他们留下深刻的印象，但很可能效果正好相反。