重点讲解：
1. as to 至于…；
No one has come up with a definitive answer as to why this should be so.
对于为什么应该是这样，还没有人想出最终确定的答案Q,XvW(KStVS@3=0hwyP。
2. be charged with (警方)指控，起诉；
He has been charged with extortion and abusing his powers.
他被控犯有敲诈勒索罪和滥用职权罪gSoHh^lfl06_。
3. on purpose 特意地；故意地；有意地；
Was it an accident or did David do it on purpose?
是意外还是戴维故意所为？
4. look into 考察；调查；研究；
We'll look into that right away.
这事我们马上就去调查@n%R*C1Ia@L。