是问题的主要原因；应负最大的责任
to be the main cause of a problem or an unpleasant situation
People who sell drugs to kids have a lot to answer for. 卖毒品给儿童的人应付重大责任。
In my opinion, the far-right has a lot to answer for.
When it comes to weird and wonderful art installations, Duchamp has a lot to answer for.
How on earth did that boy end up so messed up? His parents have a lot to answer for.
The press has a lot to answer for when it comes to the demonization of social workers.
See also: lot noun (LARGE AMOUNT)