浊积砂体一直是人们关注的焦点。
Turbidity sand has been the focus that people pay attention to.
如何高效利用网络资源一直是人们关注的焦点。
How to use the resource of Internet efficiently has been the focus of people's attention.
如何高效利用网络资源一直是人们关注的焦点。
How to use the resource of Intemet efficiently has been the focus of people 's attention.
应用推荐