Примеры употребления для international system of units
1. One of my fellow guests, an engineer, was not altogether surprised that no one knew what SI stood for — it’s the standard international system of units (metres, kilograms, seconds, etc.) — but he was irritated by the reaction of the contestants when told what it was÷ instead of looking slightly shamefaced, they looked rather superior, as if knowing the answer to an engineering/technological sort of question was somehow beneath them.