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艰巨的
gen.
herculean
;
rough
auto.
arduous
econ.
onerous
hydroel.st.
time-consuming
艰巨〔难,苦〕的
gen.
arduous
;
laborious
艰巨的
:
6 phrases
in 4 subjects
China
2
Finances
1
General
2
Technology
1
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