to have  something  down to a science
have
hæv
hāv
something
daʊn
dawn
down
tu
too
to
ə
ē
a
saɪəns
saiens
science

英語での「have something down to a science」の定義と意味

to have something down to a science
01

to know how to do something very well and efficiently 

She has meal planning down to a science. 
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