然而，我这次心得体会中最值得一提的是：即使是在最阴暗的冬天，大自然仍然试图告诉我们它的秘密！
But the best part of what I learned was that even in the darkest days of winter, nature is still trying to tell us its secrets!
如果辨别正确，会被要求再试一次。 值得注意的是，这次会在之前的声音中加入噪音，使元音更加难以辨认，本周的《新科学家》报道。
If they got it right, they were asked to try again, only this time, noise was added to make the sound harder to recognise, this week’s New Scientist reports.
安德森说，值得庆幸的是，这次衰退实际上促使了更多的志愿者挺身而出。
Thankfully, the recession has actually spurred more volunteers to come forward, says Mr Anderson.
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