Like any arthropod encased in a rigid exoskeleton, a trilobite must periodically moult, or exuviate, in order to grow.
This accordingly gives us another way of writing the exponential function, and also a way of calculating its value from a table of common antilogs.
Shafter was also deficient in field artillery, the arm traditionally used to soften up defensive positions before an assault. This weakness was partially remedied on 1 July by a well-handed battery of rapid-fire Gatling guns, the first significant use of such weapons by the United States Army.
soften up
proverbial spilled milk
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