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约翰·道尔顿
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1.
At
the
beginning
of
the 19th
century
,
John Dalton
theorised
that an
atom
was
an
indivisible
particle
of an
element
.
在
第19
世纪
开始
，
约翰·道尔
顿
建立
了
原子
是
元素
不可分
的
微粒
的
理论
。
zài
dì shí jiǔ
shì jì
kāi shǐ
,
yuē hàn · dào ěr dùn
jiàn lì
le
yuán zǐ
shì
yuán sù
bù kě fēn
de
wēi lì
de
lǐ lùn
。
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