at the present time 和at present一个意思吗

at the present time 和at present一个意思吗 in/at the present time at the present time与at present 的区别 at the present time ,at present ,now的区别` at present=at the present time是否成立?还是at present=in the prese in the present,at the present分别为什么意思?还有：in the present,at pr be present at意思 at present和at the present一样吗?如果不一样各是什么? at the present at the moment ; at the present time ; now in the present 和at present 的区别 in the present和at present有什么区别