All communication systems serve a purpose, a pragmatic function of some sort.

所有的通信系统都有一个目的，某种实用的功能。

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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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The reach of art-science tie-ups needs to go beyond the necessary purpose of research communication, and participants must not fall into the trap of stereotyping each other.

艺术与科学合作的范围不应局限于科研传播的必要目的，且参与者们必须避免陷入刻板印象的陷阱中。

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"It's still kind of ham-handed, but it served a strategic purpose, " said Trevor Parry-Giles, a political communication professor at the University of Maryland.

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