COVID-19 Fight
úgy ismeri mint a tenyerét13
    1. know something as the back of one's hand
      USA: noʊ' sʌ'mθɪ·ŋ e'z ðiː· bæ'k ʌ·v wʌ'nz hæ'nd UK: noʊ sʌmθɪŋ əz ðiː bæk ɔv wʌnz hænd
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