Можем ли мы иметь несколько < tbody > в том же < столе & gt ;?

Yes you can use them, for example I use them to more easily style groups of data, like this:

thead th { width: 100px; border-bottom: solid 1px #ddd; font-weight: bold; } tbody:nth-child(odd) { background: #f5f5f5; border: solid 1px #ddd; } tbody:nth-child(even) { background: #e5e5e5; border: solid 1px #ddd; }

 
 
Customer
Order
Month
 
 
 
Customer 1
#1
January
 
Customer 1
#2
April
 
Customer 1
#3
March
 
 
 
Customer 2
#1
January
 
Customer 2
#2
April
 
Customer 2
#3
March
 
 
 
Customer 3
#1
January
 
Customer 3
#2
April
 
Customer 3
#3
March
 
 

You can view an example here. It'll only work in newer browsers, but that's what I'm supporting in my current application, you can use the grouping for JavaScript etc. The main thing is it's a convenient way to visually group the rows to make the data much more readable. There are other uses of course, but as far as applicable examples, this one is the most common one for me.