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elementary step
elementary step
avia.
基本步骤
;
初步 阶段
|
function
function
gen.
运行
;
工作
hydroel.st.
作用
interntl.trade.
效用
;
职能
light.
功能，用途
math.
运算
met.
功用
;
用途
to phrases
elementary step
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avia.
基本步骤
;
初步
始
阶段
elementary step
:
2 phrases
in 1 subject
Aviation
2
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