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单词
primordium
释义
primordium
n. (pl. primordia) Biol. an organ or tissue in the early stages of development.
Etymology
: L, neut. of primordius original f. primus first + ordiri begin
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rivet
riviera
rivulet
riyal
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rly.
RM
rm.
RMA
r.m.s.
RN
Rn
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RNAS
RNLI
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RNZN
roach
road
roadbed
roadblock
roadie
roadman
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roadrunner
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更新时间:2026/6/7 5:14:15