名詞 e.:

1. a fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body
   同義詞：vitamin E, tocopherol, E
2. a radioactive transuranic element produced by bombarding plutonium with neutrons
   同義詞：einsteinium, E, atomic number 99
3. the cardinal compass point that is at 90 degrees
   同義詞：east, due east, eastward, E
4. the base of the natural system of logarithms; approximately equal to 2.718282...
   同義詞：e
5. the 5th letter of the Roman alphabet
   同義詞：E, letter e

e. 或 E.
abbr.（略語(yǔ)）
Engineer ,engineering.
Engineer,engineering.