Thirteen healthy men and women, averaging 62 years old, walked on a treadmill. Then the researchers placed a thin wooden block on the treadmill headed towards them.
13名平均年龄为62岁的健康男性与女性在跑步机上走路，研究人员在他们的脚前放上一块薄木块，这些志愿者们不得不跨过这个木块才能在跑步机上继续走路。
RHETT: So you still haven't gotten the wooden headed Mr. Wilkes out of your mind?
白瑞德：你还没忘掉那个木头脑袋的威尔克斯先生啊！
RHETT: So you still haven't gotten the wooden headed Mr. Wilkes out of your mind?
白瑞德：你还没忘掉那个木头脑袋的威尔克斯先生啊！
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