close in on什么意思解释？

close in on的音标：close in on的英式发音音标为：[kləuz in ɔn]close in on的美式发音音标为：[kloz ɪn ɑn]...

Let us close in on nature and come to grips with her.让我们接近大自然并努力对付大自然吧!Before the boys can flee, the police close in on them.警察包围了他们, 两个男孩无处可逃.Catch the witness lying and close in on the truth!揭穿证人的谎言,让真相浮出水面!...