to  rack  one's  brain
rack
ræk
rāk
<i>one's</i>
wʌnz
vanz
brain
breɪn
brein
[wrack] {one's} [brain]

英語での「 rack one's brain 」の定義と意味

to rack one's brain
01

to think hard or make a great effort to remember or solve something 

to [rack] {one's} [brain] definition and meaning
慣用句
くだけた
I racked my brain, but I still couldn't remember his name. 
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