kāi fàng yuán dài mǎ
see 開放源碼|开放源码[kai1 fang4 yuan2 ma3]
开
kāi
to open (transitive or intransitive)
放
fàng
to put
源
yuán
root
代
dài
to be a substitute for; to act on behalf of; to replace; to substitute
码
mǎ
(archaic) agate
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