Using sound waves to charge small devices like cell phones is not a brand new idea.
利用声波来为类似手机的小型设备充电，早已不是一个新想法了。
The baby quickly learns to look on that side whenever he or she hears a brand-new but similar sound.
这样婴儿很快就学会了每当他(她)听到一个全新的但又相似的声音的时候，就会朝旁边看过去。
The baby quickly learns to look on that side whenever he or she hears a brand-new but similar sound.
这样婴儿很快就学会了每当他(她)听到一个全新的但又相似的声音的时候，就会朝旁边看过去。
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