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to phrases
toughen
['tʌf(ə)n]
v
gen.
使强韧
;
使
变强硬
;
使
韧化
;
使
变黏稠
;
使
变困难
archit.
使
变坚韧
;
使
变粘稠
plast.
增韧
;
增黏稠
tech.
韧化
(作用)
toughen
:
1 phrase
in 1 subject
China
1
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