1. Even on Valentine's Day, when the price of a dozen roses and delivery can soar as high as $150, 12 of Roses Only's most expensive flowers sell for just $35.
    即使是在情人节，当一打玫瑰价格外加送花费可上涨至150美元的时候，"惟一玫瑰"花店里最贵的玫瑰也只卖35美元一打。

2. While natural gas use increases, use of coal as fuel is decreasing.
    随着天然气利用量的增长，煤炭作为燃料的使用量正在减少。

3. The car consumes a lot of fuel.
    这辆汽车很费汽油.

4. The truck driver and his helper unloaded the delivery at the factory.
    卡车司机和他的助手在厂里卸货。

5. This cycle of seasons became the year.
    各季节循环一周期就成为一年。

6. Then they feel guilty and they start the whole cycle over again."
    随后他们就感到内疚，接着他们就再把这个全过程重复一遍。"

7. Natural gas, an outstanding energy fuel, can be used to heat homes, make electricity, and power cars.
    天然气这种优良的能量燃料可以用于家庭取暖、发电和驱动汽车。

8. He showed that the average individual´s sleep cycle is punctuated with peculiar bursts of eye-movements,
    他指出，平常人的睡眠周期中不时伴有一阵阵奇怪的眼球队活动，

9. His studies with rats have demonstrated two primary effects of activity: vigorous physical exercise provides the brain with more fuel, and skill-based exercise increases the formation of connections in the brain, which, according to the proposals of
    他对老鼠的研究已经表明运动具有两大功效：强力体育运动给大脑提供更多的燃料，而技巧性的运动则增强大脑神经的联结。依照某些科学家的见解，这种联结能使大脑更好地处理信息。

10. And upsetting the natural water cycle (循环) on Earth makes significant problems for its inhabitants.
    扰乱地球上水的自然循环会对它的居民造成严重问题。

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