我认为手机是当今世界最有用的发明之一的翻译：I think mobile is one of the world's most useful invention 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

I think the phone is the world's most useful inventions

I think mobile is one of the world's most useful invention

I thought the handset is now one of world most useful inventions

I am of the view that mobile phone is the world's most useful in the invention of a

I think mobile is one of the world's most useful invention