In that case , we would have introduced a saboteur into the data .
如果那样的话,我们就在数据中引入了一个破坏者数据。
The u.s. holds less than 5 percent of the world 's population but produces nearly 25 percent of carbon emissions and has played the role of saboteur by failing to ratify the kyoto protocol and commit to reducing greenhouse gas emissions to 7 percent below 1990 levels .