Biologists also noted deer sniff and lick an unfamiliar rub, which suggests that this visual mark on a small tree plays an important communication purpose in the social life of deer.

生物学家也注意到鹿会嗅和舔陌生的擦痕，这表明小树上的这种视觉标记在鹿群的社会生活中起着重要的交流作用。

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Buck rubs also have a scent produced by glands in the foreheads of deer that is transferred to the tree when the rub is made.

雄鹿摩擦都有一种由雄鹿前额上的腺体产生的气味，这种气味在制造擦痕时就涂抹到了树上。

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The rub is, if the vast majority of people increasingly agree that climate change is a global emergency, there's far less agreement on how to fix it.

问题是，如果绝大多数人越来越认同气候变化是一个全球性的紧急事件，那么在如何解决这个问题上就没有那么多的共识了。

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Every time I drive the steering wheel of my car, I rub off some items. But that's OK, it's still the very same physical object.

每次我使用方向盘时，都会摩擦掉一些微粒，但没关系，它还是原来那个物体。

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Now those oligarchies were based on different things, and that's where the rub came.

但这些寡头是建立在不同基础之上的,正是这一点导致了双方的摩擦

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But it isn't, and that is the rub.

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But Renard, 42, believes the oil-producing country can reproduce the form that saw them rub shoulders with the world's elite at the 2006 World Cup finals in Germany.

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Dip them into water -- keep a bucket of water near you -- shake off the excess water and rub that over the upholstery, and the hair will collect on the rubber gloves.

CNN: Pet hair, poop and other cleaning challenges