John Dunlosky, a professor in the US, suggests that "you start by reading a textbook with your favorite pens and colors, and then write down the important ideas on small cards while doing so you actually try to test yourselves on them."
2
把这些卡片按颜色归类。
Sort these CARDS according to [by] their colours.
《新英汉大辞典》
3
当他继续说出卡片上图片的名字或回答简单的问题时玻璃是什么颜色的?
As she continues to name the pictures on the CARDS or responds to simple questions What is the color of grass?