translation.en: What you see here is performance on that head-turn task for babies tested in Tokyo and the United States, here in Seattle, as they listened to "ra" and "la" -- sounds important to English, but not to Japanese.
translation.zh: 这里看到的是扭转头测试效果 用来测试日本东京 和美国西雅图的婴儿， 让他们听ra和la的发音 这两个发音在英文里很重要，在日语里却没有