两个小时后表演结束了。
它们所做的是把最明显的、风险最高的表演留到幼鸟有能力照顾自己后再进行。
What they do is they save their best performances, their most conspicuous and most risky displays for the time just before the baby birds become able to take care of themselves.
看完喜剧表演后，他们笑着离开了剧院。
After they saw the comedy show, they left the theatre laughing.
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