n. 表面；曲面（surface的复数）
v. 使…成平面（surface的第三人称单数形式）

Imaginary \Im*ag"i*na*ry\, a. [L. imaginarius: cf. F.
imaginaire.]
Existing only in imagination or fancy; not real; fancied;
visionary; ideal.

Wilt thou add to all the griefs I suffer
Imaginary ills and fancied tortures? --Addison.

{Imaginary calculus} See under {Calculus}.

{Imaginary expression} or {Imaginary quantity} (Alg.), an
algebraic expression which involves the impossible
operation of taking the square root of a negative
quantity; as, [root]-9, a + b [root]-1.

{Imaginary points}, {lines}, {surfaces}, etc. (Geom.),
points, lines, surfaces, etc., imagined to exist, although
by reason of certain changes of a figure they have in fact
ceased to have a real existence.

Syn: Ideal; fanciful; chimerical; visionary; fancied; unreal;
illusive.