Dr. Deb Roy turned his own home into a 1)________ laboratory and his Guinea pig (小白鼠/研究对象)was 2)__________. He set up his home as an 3)________ space and captured this kind of rich 4)_______ record of his own child's development from 5)________. Cameras and microphones recorded every second of Deb's son's life, from the moment he was born until he was 6)_____ years old. Dr. Roy's interest is to understand the 7)_______ stages of language formation, from 8)________ to using single words as a complete request and descriptions. His focus and aim is to capture the phase up to the 9)_______ utterance and his son was an 10)_________.