四级She worked out that, if the left hemisphere was staying alert to keep guard in a strange environment, then it would react to the irregular beeps by stirring people from sleep and would ignore the regularly timed ones.

她计算出，如果左半球在陌生的环境中保持警觉以保持警惕，那么它会对不规则的嘟嘟声做出反应，将人们从睡眠中唤醒，并忽略定时的嘟嘟声。

2017年12月四级真题（第一套）阅读 Section C

四级If the robot is unsure whether an animal is suitable for the microwave, it has the opportunity to stop, send out beeps ( ' , 嘟嘟声 ), and ask for directions from a human.

如果机器人不确定动物是否适合使用微波炉，它有机会停下来，发出嘟嘟声（'，嘟嘟声 ), 向人类问路。

2016年6月阅读原文

四级If the robot is unsure whether an animal is suitable for the microwave, it has the opportunity to stop, send out beeps, and ask for directions from a human.

如果机器人不确定动物是否适合使用微波炉，它有机会停下来，发出嘟嘟声，并向人类问路。

2016年6月四级真题（第三套）阅读 Section C

四级Sasaki re-ran the experiment while presenting the sleeping participants with a mix of regularly timed of the same tone and irregular beeps of a different tone during the night.

佐佐木重新进行了这项实验，同时向睡眠中的参与者呈现了夜间定时的相同音调和不规则的不同音调的嘟嘟声。

2017年12月四级真题（第一套）阅读 Section C

四级Curious if the left hemispheres were indeed remaining awake to process information detected in the surrounding environment, Dr. Sasaki re-ran the experiment while presenting the sleeping participants with a mix of regularly timed beeps (蜂鸣声) of the same tone and irregular beeps of a different tone during the night.

由于好奇左半球是否真的保持清醒以处理周围环境中检测到的信息，佐佐木博士重新进行了实验，同时向睡眠的参与者发出了定时的嘟嘟声(蜂鸣声) 相同音调的不规则嘟嘟声和不同音调的不规律嘟嘟声。

2017年12月大学英语四级考试真题（第1套）