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ecologic system
ecologic system
hydroel.st.
生态系统
;
生态系
|
engineering
engineering
avia.
研制部门
;
设计和研制
desert.
工程
econ.
工程学
met.
工程
;
设计
;
技术
;
工艺
;
操纵技术
space
工程 技术
to phrases
ecologic system
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hydroel.st.
生态系统
;
生态系
ecologic system
:
10 phrases
in 2 subjects
Space
1
Technology
9
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