It is very important to deal with the rubbish in cities.

处理城市垃圾是很重要的。

If we don't deal with the rubbish problem, the rubbish in cities will pollute the environment and it is bad for our health.

如果我们不处理这个垃圾问题，城市垃圾将会污染环境，这对我们的健康也是有害的。

So some effective measures must be taken to save our life.

所以必须要采取一些有效的措施来拯救我们的生活。

Firstly, we should classify them according to different kinds of rubbish.

首先，我们必须根据不同种类的垃圾进行垃圾分类。

Secondly, we should recycle the newspaper and glasses.

第二，我们应该回收报纸，循环利用玻璃。

Thirdly, the dirty water must be well handled.

第三，脏水必须处理好。

Last, laws about environmental protection must be made.

最后，必须要制定关于环境保护的法律。

We should begin from ourselves to protect our environment and save our life.

我们应该从我们自己做起来保护我们的环境、拯救我们的生活。

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作文地带知识拓展:

• Life 英 [laɪf] 美 [laɪf]】基本解释

  n. 生活，生计；生命，性命；一生，寿命；人生，尘世

  life 变化形式 复数： lives

  life 生命 life 's work 毕身成就

  来自古英语life,存在，生命，来自PIE*leip,停留，持续，词源同live,leave.比较world. 比喻用法。

  Life释义：

  the period between birth and death, or the experience or state of being alive

  寿命;生命;一生，人生;生活;性命

  Life's too short to worry about money!

  人生短暂，何必为金钱而烦恼！

  for the whole of a person's life:

  I believe marriage is for life.

  我相信婚姻是一辈子的事情。

  to be willing to die in order to defend or support someone or something:

  They were ready to give their lives for their country.

  他们已做好了为国捐躯的准备。

  a way of living or a particular part of someone's life

  生活方式;生活（的某一部分）

  her family/private life

  她的家庭／个人

  my working life

  我的职业生涯

  everything that is alive

  活物，生物

  human/marine/plant life

  人类／海洋生物／植物

  to completely change how or where you live:

  She decided to start a new life in Australia.

  她决定在澳大利亚开始新的生活。

  the period for which a machine or organization lasts

  寿命；存在周期；有效期

  The newer batteries have a much longer life.

  新一代电池的寿命要长得多。

  the quality that makes people, animals, and plants different from objects, substances, and things that are dead

  生命力，生气

  figurative I looked through the window but I couldn't see any signs of life (= people moving).

  我透过窗子向外望去，却看不到有任何人类活动的迹象。

  the quality of having a lot of energy, interest, or excitement

  活力，热情

  She's so full of life.

  她充满了活力。