"A 1 in 30,000 to 1 in 50,000 chance of being born with it."
- "A 1 in 30,000 to 1 in 50,000 chance of being born with it."
"1 in 30,000" 「３万分の1」
"1 in 50,000" 「5万分の１」
"1 in 30,000 to 1 in 50,000"「３万分の1から5万分」
"30,000" = "thirty thousand" "50,000" = "fifty thousand"
"a ~ chance" 「〜の確率」
"chance of ~" 「確率で〜」
"being born with it" 「生まれる」"it" は病気のことを表します。
オーストラリア 
