The key to living in a city and peacefully co-existing as a social animal in tight quarters is to set a delicate balance of seeing and not seeing.

作为一个社会动物，在城市里生活，在狭小的空间里和平共处，关键在于要在可视与勿视之间保持微妙的平衡。

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With an exceptional balance of protein and amino acids, quinoa, they declared, is virtually unrivaled in the plant or animal kingdom for its life-sustaining nutrients.

他们宣称，藜麦所含的蛋白质与氨基酸配比恰到好处，就维持生命的营养而言，它在植物与动物王国里几乎无与匹敌。

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Animal protection, everyone's responsibility. Please maintain ecological balance.

保护动物，人人有责。请维持生态平衡。

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After months of negotiations with the Council of Minister, MEPs debated a second reading deal aiming to balance animal welfare with medical and scientific research.

BBC: Animal welfare laws

The problem will be worsened by global warming affecting the population balance of animal predators such as owls, snakes, birds and bats, animals that keep insects and rodents in check.

CNN: Global warming may harm human health