x升至b时需要上标

\\u1D47

a = ᵃ = \\u1d43 (modifier letter small a)
b = ᵇ = \\u1d47 (modifier letter small b)
c = ᶜ = \\u1d9c (modifier letter small c)
d = ᵈ = \\u1d48 (modifier letter small d)
e = ᵉ = \\u1d49 (modifier letter small e)
f = ᶠ = \\u1da0 (modifier letter small f)
g = ᵍ = \\u1d4d (modifier letter small g)
h = ʰ = \\u02b0 (modifier letter small h)
i = ⁱ = \\u2071 (superscript latin small letter i)
j = ʲ = \\u02b2 (modifier letter small j)
k = ᵏ = \\u1d4f (modifier letter small k)
l = ˡ = \\u02e1 (modifier letter small l)
m = ᵐ = \\u1d50 (modifier letter small m)
n = ⁿ = \\u207f (superscript latin small letter n)
o = ᵒ = \\u1d52 (modifier letter small o)
p = ᵖ = \\u1d56 (modifier letter small p)
q = n/a
r = ʳ = \\u02b3 (modifier letter small r)
s = ˢ = \\u02e2 (modifier letter small s)
t = ᵗ = \\u1d57 (modifier letter small t)
u = ᵘ = \\u1d58 (modifier letter small u)
v = ᵛ = \\u1d5b (modifier letter small v)
w = ʷ = \\u02b7 (modifier letter small w)
x = ˣ = \\u02e3 (modifier letter small x)
y = ʸ = \\u02b8 (modifier letter small y)
z = ᶻ = \\u1dbb (modifier letter small z)

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