Rather than 'English obverses' use 'Imperial/US equivalents'.
In UK and North American supermarkets everything is pre-packed or available for you to help yourself to, so you never need to ask for anything in any specific weight or volume or worry about their conversions.
Just choose the size of milk bottle you want or pick as many apples as you need.
If you still want to know how to convert from metric to US/Imperial units, click here.
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