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astatic (adj.)
[astatic 词源字典]
1827, from Greek
astatos
"unstable, not steadfast," from
a-
, privative prefix (see
a-
(3)), +
statos
"placed, standing," from PIE root
*sta-
(see
stet
).
[astatic etymology, astatic origin, 英语词源]
[astatic 词源字典]