句首的More than just a calculator是什么句子成分

More than just a calculator, this is a complete personal organisation system. 远非只不过台电脑，这是一个完备的个人组织系统。

请问：句首的More than just a calculator是什么句子成分?

More than just a calculator, this is a complete personal organisation system. 远非只不过个电脑，这是一个完备的个人组织系统。

▲我觉得，这应该视为一种“语言现象”，而不要局限于某个句子或就事论事。

More than just a calculator是一个“名词性短语”，用在句首作状语，修饰后面整个句子或句子的谓语动词，具备“提示”或“讲解”用途。所谓“提示”或“讲解”用途，就是为后面句子要表达某种含义提供更多的信息。在乎思上可以变成一个并列句。

从意义上可以如此理解：This is more than just a calculator; it is a complete personal organisation system.

又如：

▲A beautiful girl about my age, she bought the ticket for me when hearing that I had lost my wallet.

暗示着这个跟我年龄相当的女生乐于助人。在乎思上理解一个存在句：There was a beautiful girl about my age. She bought the ticket for me when hearing that I had lost my wallet.

▲在2014年广东高考考试英语考试试题中，某段文章的开头，也有一个类似的句子：

A scientist with many years’ experience, he started this type of research in the early 1990s when he heard about hundreds of athletic shoes washing up on the shores of the northwest coast of the United States.

本句中，A scientist with many years’ experience 也是为后面的句子要表达某种含义提供了更多的信息，说明这位科学家经验丰富，为研究工作的成功做了铺垫。也理解为一个存在句：There was a scientist with many years’ experience, and he started this type of research in the early 1990s when he heard about hundreds of athletic shoes washing up on the shores of the northwest coast of the United States.

▲我觉得，可以把这种现象概要如下：

1. 把这种句子看作人为的省略句或逗号句都是不妥的，这是客观存在的语言现象。

2. 这种名词不是单个的名词，而是名词性短语，里面包括着更多的信息。

3. 逗号表示停顿。

4. 它跟句子的主语不是同位关系。

5. 在成分划分上，看作状语更适合。