根据一项调查英文

Recently，my class holds a heated discussion about whether students should carry a mobile phone． About 60% of us students agree that we should be allowed to carry a mobile phone．This is because mobile phones are small in size，light in weight，and easy to carry．（高分句型一）It is convenient for us to communicate with our parents and friends． However，while the others（About 40% of the students）disagree，saying that it is bad for our growth．（高分句型二） The students carry a mobile phone in order to show off．And it is a waste of time and money． Personally，I think it has both advantages and disadvantages．If we make use of it properly，it may be changed a better thing．（高分句型三）

“调查”的英文是：inquiry、investigation、research、survey、Investigate。1、inquiry普通常用词，指正式调查，也指一般的打听或查询。读音：英 [ɪn'kwaɪrɪ]美 [ɪn'kwaɪri]n.调查，审查;询问，质问，质询，追究;探究;打听[例句]：The inquiry hasuncoverednumerousexamplesofracism.该项调查发现多起种族歧视的事例。2、investigation一般指有系统的调查以得到希望发现或需要知道的事。读音：英 [ɪn,vestɪ'geɪʃ(ə)n]美 [ɪn,vɛstɪ'ɡeʃən]n.（正式的）调查，研究;侦查;科学研究;学术研究[例句]：TheauthoritiesareobstructingaUnitedNations investigation.当局正在阻挠联合国的调查。3、research指科学工作者等为揭示自然规律或获取某个领域的新知识而进行长时间的调查研究。读音：英 [rɪ'sɜːtʃ;'riːsɜːtʃ]美 ['risɝtʃ]n.研究，追究;探讨，探测;调查;探索vi.做研究;探究;（从市场调研中）得出所预测的结果vt.从事…的研究，为…而做研究[例句]：Heneedstoresearchaboutthecoffeemarket.他需要对咖啡市场进行调查。4、survey多指为写书面报告而进行的民意测验或调查。英 [ˈsəːveɪ;(forv.)səˈveɪ]美 [ˈsɝˌve;(forv.)sɝˈve]vi.测量土地vt.调查;勘测;俯瞰n.调查（表），调查所，测量，测量部，测量图;概观，检查，鉴定书;环顾[例句]：Ingeneral,the survey showedproblemswithpostnatalhospitalcare.总体而言，调查显示医院的产后护理存在问题。5、investigate是官方调查的意思,比较正式。警方、法院等组织用得较多。 英 [ɪn'vestɪgeɪt]美 [ɪn'vɛstɪɡet]vt.调查;审查;研究vi.作调查[例句]：AseniorofficialwassentfromLondonto investigate theclaims.从伦敦派出了一名高级官员去调查索赔要求。

As is reported,the number of tigers is decreasing and in a danger of dying out.

survey干嘛？