| 释义 |
macroelement
macroelement[¦mak·rō′el·ə·mənt] (industrial engineering) An element of a work cycle whose time span is long enough to be observed and measured with a stopwatch. macroelement
macroelement [mak″ro-el´ĕ-ment] a chemical element that has a minimal daily requirement greater than 100 mg; calcium, phosphorus, magnesium, potassium, sodium, and chloride are macroelements. |