get at什么意思解释？

get at的音标：get at的英式发音音标为：[ɡet æt]get at的美式发音音标为：[ɡɛt æt]...

We want to get at the truth. Who killed him? And why?我们想查明真相。是谁杀了他？为什么？The files are difficult for you to get at.档案你是难以看到的.The cat is on the chair trying to get at the bird.猫在椅子上想逮那只鸟....