to  be  instrumental in   something
be
bi
bi
instrumental
ɪnstrəmɛntl
instrēmentl
in
ɪn
in
something
sʌmθɪng
samthing

Définition et signification de « be instrumental in something » en anglais

to be instrumental in something
01

to be an important factor or contributor to a specific result 

Exemples
Her guidance was instrumental in the project's success. 
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