When tested in the morning, and again in the evening, the babies who'd heard the tricky boundary vowels all night showed brainwave activity indicating that they could now recognize this sound.

• 在早晚各进行了测试之后，那些整晚都在听难识别的边界音的婴儿显示出的脑波活动说明他们现在能够识别这个新声音了。