◎Cambridge Discovery Education Interactive Readers are the next generation of graded readers - captivating topics, high-impact video, and interactive exercises designed to motivate and engage.
Why do we need sleep? What if we get too little or too much? Explore the mysteries of the night - like what really happens when we sleep!
人類需要多少睡眠？睡眠可以幫助學習嗎？作夢代表什麼？此書告訴你不同睡眠的作用、如何治療失眠、跟各種人類夢遊時奇異能力！