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a. 真實的、正確的、忠誠的、可靠的、純粹的、正式的

n. 真實、準確

adv. 真實地、準確地

學術名詞

真：數學、資訊
成立：數學
真空速：航空太空
真近點離角：航空太空
真面：礦物學

英文釋義

proper alignment; the property possessed by something that is in correct or proper alignment
make level, square, balanced, or concentric
consistent with fact or reality; not false
accurately placed or thrown