1、We don’t need to do big things—we can start out small.

1、我們不需要做大事，我們可以從小事做起。

2、In addition to the photos, nothing taken away; In addition to the footprints, nothing left.

2、除了相片，什么都不要帶走；除了腳印，什么都不要留下。

3、No one can live without water or air.

3、沒有人能離開水和空氣生存。

4、Do not throw rubbish onto the ground. Do not waste water. Use both sides of paper when you write. Stop using plastic bags for shopping. Make classrooms less noisy.

4、不要在地上扔垃圾。不要浪費(fèi)水。當(dāng)你寫字時(shí)要在紙的兩面都要寫。停止使用塑料袋去購物。減少教室里德吵鬧聲。

5、Don't litter the floor.

5、不隨地扔垃圾。

6、Without the shade from trees, Earth would get too hot to live on.

6、沒有了樹蔭，地球?qū)?huì)變得太熱而不能生存。

7、We need to protect Earth because it is our home.

7、我們需要保護(hù)地球因?yàn)樗俏覀兊募摇?/div>

8、Many rivers and lakes are seriously polluted.

8、很多河流湖泊已經(jīng)受到嚴(yán)重污染。

9、Pollution is legally controlled and enforced through various federal and state laws.

9、污染由聯(lián)邦和州各種法規(guī)控制和強(qiáng)制執(zhí)行。

10：Right side,please.

10、請(qǐng)靠右行。