中国是五个核大国中唯一一个公开宣布不首先使用核武器，不对无核国家使用核武器的国家。

China is the only one among the five nuclear powers to publicly declare no first use of nuclear weapons and no use of nuclear weapons against non-nuclear states.

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众所周知，中国的核武库在五核国中是最小、最落后的，但中国却是五国中第一个奉行不首先使用核武器政策的国家。

As is known to all, China's nuclear Arsenal is the smallest and least advanced among the five nuclear powers. Yet, China is the first to pursue the policy of no-first-use of nuclear weapons.

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首先，我们不鼓励使用轿车。

First, we can discourage the use of cars.

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在使用函数来收集数据时，如果不首先以某种方式对收集的数据进行处理，那么它们将会是无效的。

When using this function to gather data, some of the raw data collected will not be useful without first processing it in some way.

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不要使用，如果您怀孕或哺乳期不首先咨询你的医生。

Do not use if you are pregnant or lactating without first consulting your physician.

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不要使用，如果您怀孕或哺乳期不首先咨询你的医生。

Do not use if you are pregnant or lactating without first consulting your physician.

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