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As many expectant mothers know, a sudden car horn can start a etus kicking.
就如許多準媽媽知道的那樣，突如其來的汽車喇叭聲也能引起胎兒的踢動。
Not only can fetuses hear outside noises, they sometimes remember what they've heard.
胎兒不僅能夠聽到外界的聲音，他們有時也會記住他們所聽到的。
One study found that infants who repeatedly heard a soap opera theme song in the womb reacted positively when they heard that same music after birth.
一項研究發現，嬰兒出生后，會對在子宮里反復聽到的肥皂劇的主題曲做出積極的反應。
Perhaps this ability to remember helps a newborn recognize its mother's voice.
或許這種記憶能力幫助一個新生兒認出母親的聲音。
A fetus can't hear specific words or intonation–these are too muffled. Instead, they remember the rhythm of their mothers' voices.
胎兒不能聽到具體的詞或者聲調-這些都太低沉了。相反地，他們記得住母親聲音的節奏。
To check this out, researchers gave newborns a special nipple rigged to a tape recorder.
為了驗證這一點，研究人員給了新生兒一個特殊的與錄音機相連的奶嘴。
By changing the way they sucked, these infants could modify the cadence of a prerecorded voice.
通過變換他們吸允的方式，這些嬰兒能夠改變預先錄制的語音節奏。
Eighty percent of these newborns sucked in the way that produced a voice with their mother's specific rhythm.
百分之八十的新生兒吸吮時的聲音與母親聲音的特定節奏一致。
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