单叶双曲面

hyperboloid of one sheet (math.)

surname Shan

bill / list / form / single / only / sole / odd number / CL:個|个[ge4]

to be in harmony

leaf / page / lobe / (historical) period / classifier for small boats / a surname

surname Shuang

two / double / pair / both / even (number)

hyperbola / hyperbolic (function)

surname Qu

bent / crooked / wrong

tune / song / CL:支[zhi1]

variant of 麴|曲[qu1]

yeast / Aspergillus (includes many common molds) / Taiwan pr. [qu2]

(math.) hyperboloid

curved surface / surface

face / side / surface / aspect / top / classifier for objects with flat surfaces such as drums, mirrors, flags etc

variant of 麵|面[mian4]

flour / noodles / (of food) soft (not crunchy) / (slang) (of a person) ineffectual / spineless