在这里，您要为CurrentDate分配一个momentjs实例：

Here you are assigning an instance of momentjs to CurrentDate:

var CurrentDate = moment();

这里只是一个字符串，一个来自默认格式的momentjs实例的结果：

Here just a string, the result from default formatting of a momentjs instance:

var CurrentDate = moment().format();

这里是自1月以来的秒数......好吧，unix时间戳：

And here the number of seconds since january of... well, unix timestamp:

var CurrentDate = moment().unix();

此处另一个字符串为ISO 8601（ ISO 8601和RFC 3339日期格式之间有什么区别？）：

And here another string as ISO 8601 (What's the difference between ISO 8601 and RFC 3339 Date Formats?):

var CurrentDate = moment().toISOString();

这也可以这样做：

var a = moment();
var b = moment(a.toISOString());

console.log(a.isSame(b)); // true