系统列举
Systematic Listing
系统地列举两个变量组合的所有可能性（例如从一组选项中选出所有方式）。
Enumerate possibilities of combinations of two variables systematically (e.g. all ways to choose from a set of options)
学习证据 / Evidence
- 列举出3道开胃菜和4道主菜的所有可能套餐组合
- 将组合系统整理成表格，确保没有遗漏
- 解释为什么组合总数等于每类选项数量的乘积
- List all possible meal combinations from 3 starters and 4 mains
- Organise combinations into a systematic table to ensure none are missed
- Explain why the total number of combinations equals the product of the options in each category
评估问题 / Assessment
如果{{name}}可以从3种T恤颜色和2种裤子颜色中任选组合，ta能列出所有可能的穿搭而不遗漏或重复吗？
If {{name}} can choose any combination of 3 T-shirt colours and 2 trouser colours, can they list every possible outfit without missing any or repeating?