一套二十副的次序卡不单令小朋友学习生命过程及事序，更可从重新排序的过程中领会到因果关系及逻辑性。
A box of twenty sets of sequencing fun puzzle CARDS stimulate kids to learn the ordering of life cycles and events.
接着提出结合时间次序对用形合法表达的因果关系进行汇聚的方法。
Then, combining with time sequence, the cluster model of causation expressed by hypotaxis is introduced.
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