然而，当两只猴子被放置在不同但相邻的房间里，以便让它们观察到对方用石头换来了什么时，它们的行为就变得明显不同了。

However, when two monkeys were placed in separate but adjoining chambers, so that each could observe what the other was getting in return for its rock, their behavior became markedly different.

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然而，碳管理教授 David Reay 认为，尽管微波炉消耗大量能源，但与汽车相比，它们的排放量很小。

However, David Reay, professor of carbon management, argues that, although microwaves use a great deal of energy, their emissions are minor compared to those from cars.

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然而，随着时间的推移，我们逐渐但毫无疑问地成为未来人眼中的陌生人。

Still, as time goes on, we gradually but unquestionably become strangers to future people.

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But it's a raw food restaurant. They also sell some cooked food. But I love their cuisine.

但那家餐厅的料理主要是生食。也有些热菜。然而我很喜欢他们家的料理。

有益健康的美食店 - SpeakingMax英语口语达人

But it's very safe. However, you have to remember that it's still New York,

但它非常安全。然而你还是要记得，这里是纽约，

在上西区 - SpeakingMax英语口语达人