1、包围
... cling to粘在...上 close in on包围，围住 close-up view特写镜头；接近的观察 ...
2、逼近
... sprinter 短跑运动员 close in on 逼近 posit 认为 ...
3、逐渐接近
一、 ... by far 好得多 close in on 逐渐接近 introduce 引进 ...
close e in on逐渐接近
to close in on合围;紧逼
close in on the enemy四周环围
close in on vtr figurative比喻
close-in-on development追赶发展