Idiom
Mycobacterium leprae causes leprosy, Corynebacterium diphtheria causes diphtheria and Vibrio comma causes

typhoid
tetanus
influenza
cholera

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Idiom
To stand to one's guns

To maintain dignified and unbending attitude
To maintain one's position
To persevere when hardships press
To keep the guns close to oneself even amid danger

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