该水平显示的是神经兴奋活动。
到目前为止，主题公园的游客们看到这些鸟儿在活动都很兴奋。
So far, visitors to the theme park have been excited to see the birds in action.
你得提供持续而有组织的娱乐活动，否则孩子们可能会过度兴奋。
You'll need to provide continuous, organized entertainment or children may get overexcited.
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