翻译下面5句话（中译英）

1学习一门语言 首先要考虑的问题应该是用它来交际
The principal purpose of learning a language is communicating

2全球日益变暖 要警示人们在发展经济的同时注意采取行动 保护我们赖以生存的地球
Global warning warns people that they should take measures to protect the earth that upon which mankind depends for survival when they develop economy.

3战争对本来就贫穷的国家产生了巨大的影响 数百万人们死于饥饿和疾病
Wars have great influence on poorer countries, which means millions of people die of starvation and diseases.

4为了人类自己 是该我们对这个地球负起责任的时候了
For ourselves， it is time for us to be responsible for the earth.

5让我们行动起来，节约能源，否则一旦我们到了无以挽回的地步都无济于事。
Let s start to save resources. otherwise, we can't improve matters when the situation becomes hopeless.

希望能帮到你：）

1.Learning a language should be the first issue to be considered is to use it for communication.
2.Growing global warming, warning people to be economic development, paying attention to take action to protect our survival on Earth.
3