麻烦帮我翻译下面的英文

有点多，是关于条形码介绍的，谢谢各位啦！
summary of main changes
What bar codes do
Number allocation
What happens when a consumer unit is also a traded unit?
Number notification
Re-using item numbers
the ideal bar code
For consumer units
For traded units
For logistics units,for exampie pallets
Bar code origination
Bar code colours
choosing the correct bar code
Bar codes on consumer units
main requirements
X-dimension
Light margins or quiet zones
bar codes on traded units
Using EAN-13 or UPC-A bar codes
Using ITF-14 bar codes
Main requirements
Bearer bars
Light margin indicators
Using GS1-128 bar codes
Main requirements
Bearer bars
Light margin indicators
When are brackets required around the application identifiers?
Products with a shelf life of up to 42 day

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