1.muddy 把...弄糊涂;搅混水
It's difficult enough without muddying the issue with religion.
即使不把宗教牵扯进去,这个问题也已经够棘手的了 。
2.origin 起源
The origin of the word remains obscure.
该词的来源尚不清楚 。
3.date 确定...的年代
You cannot date the carving and it is difficult to date the stone itself...
无法确定这一雕刻的年代,连石头本身的年代都难以判断 。
4.reveal 显示;透露
Details of the murder were revealed by the local paper.
地方报纸披露了谋杀的细节 。