The participants are given the protein powder or a placebo over a period of eight weeks. About four volunteers are tested weekly, and their diet and exercise patterns are monitored after they begin taking the protein powder. They are checked after four weeks and given a second battery of tests after eight weeks, Walker said.
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"Such discoveries are extraordinarily uncommon," Walker said.
沃克教授说：“像这样的发现是非常罕见的。”
"In the past we've had trouble getting our devices into the U.S. market," Mr. Walker said.
“过去，我们的产品很难进入美国市场，”沃克先生说。
The first major finding, Walker said, was that learning ability degrades as the day wears on.
沃克尔称第一个重要发现便是，人们的学习能力会由早到晚递减。
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