1．That probably does not seem much to you or me, but it is a rapid increase when_compared_to other natural changes.
那对你或我来说可能不算很多，但是跟其他的自然变化相比，这却是一种快速的增长。
2．There_is_no_doubt that the earth is becoming warmer and_that_it_is human activity that has caused this global warming rather than a random but natural phenomenon.
毫无疑问，地球正在转暖，全球转暖是人为的，而不是随意的自然现象。
3．All scientists subscribe_to the view that the increase in the earth's temperature is due to the burning of fossil fuels like coal, natural gas and oil to produce energy.
所有的科学家都赞同这种观点，即地球温度的上升，是由于人们燃烧像煤、天然气和石油这样的化石燃料来生产能量而引起的。
4．As I'm not sure where_to_start with my project, I would appreciate any suggestions you may have.
因为我还不清楚我该从哪里着手开始我的研究，所以我会感激你们的任何建议。
5．It is OK to leave an electrical appliance on so_long_as you are using it—if not, turn it off!
只要你在使用电器设备，你便可以把它开着——如果不用就把它关掉！
