A mathematician and an engineer agreed to take part in a psychological test.
一数学家和一工程师做一心理测试。
They also took a standard psychological test that indicated their mood before and after running.
他们还接受了一次标准的心理测试，以标明他们在跑步前后的情绪变化。
They also took a standard psychological test that indicated their mood before and after running.
他们还接受了一次标准的心理测试，以标明他们在跑步前后的情绪变化。
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