答案是: easy是一个形容词，容易的。I think this problem is easy.我认为这个问题是容易的。
He thinks this problem isn't difficult.他认为这个问题不难。
It isn't easy to learn English well.把英语学好不容易。
It isn't easy to play ping pong well.把乒乓球打好不容易。
A digital camera provides a quick and easy means to capture ideas for later reference.
此外还可以用数码相机来轻松并快速地捕捉想法，供日后参考。
It is very easy in this situation to press Undo one time too many.
这种情况下，很容易一下单击了多次撤销命令。
It’s easy to debug, and when something doesn’t behave properly, it’s easy to troubleshoot.
这样比较容易调试，如果有些地方工作不正常，也比较容易排查故障
