每个盒子里其实都有一个球，而我们会事先决定孩子们在四次尝试中的每一次会猜错还是猜对。

There were secretly two balls, one in each box, and we had decided in advance whether the children were going to get it "right" or "wrong" on each of the four guessing trials.

youdao

每个盒子里其实都有一个球，而我们会事先决定孩子们在四次尝试中的每一次会猜错还是猜对。

There were secretly two balls, one in each box, and we had decided in advance whether the children were going to get it "right" or "wrong" on each of the four guessing trials.

youdao