Native peoples have been studied by anthropologists in many societies.土著人已经被许多协会的人类学家研究过了.Anthropologists have discovered that fear, happiness, sadness, and surprise.人类学家们已经发现,恐惧, 快乐, 悲伤和惊奇.Anthropologists are still tryi...
Figure 4 - 2 shows a present - day laboratory version of the electroscope.图4 - 2就是目前实验室里的验电器样式.The leaves of the electroscope slowly diverge.验电器的叶片慢慢张开.Figure 4 - 2 a present - day laboratory version of the electroscope....