求专业英语翻译帮忙！急！
Letter of Certificate of Community and Voluntary Service
This is to certify that 学生姓名, a bona fide student of Senior 2 Class #1, of the 学校名称, City of Beijing, has completed 50 hours of voluntary service. During his/her enrolment at 学校名称, he/she has actively participated in various volunteer activities organized by our school and the community, including beautifying the community environment, caring for widows, orphans and empty nesters, organizing community essay contest, blackboard design and tutoring primary school students in the community, etc. Details of his/her participation are as follows:
September 22, 2012: Bilingual guided tour services at the Beijing Tiantan Park (4 hours)
November 17, 2012: Hujialou Street Community, Chaoyang District, Beijing (2 hours)
September to December, 2012: Shilipu South Community, Chaoyang District, Beijing (12 hours)
March 23, 2013: Bilingual guided tour services at the Beijing Tiantan Park (4 hours)
January to December, 2013: Shilipu South Community, Chaoyang District, Beijing (18 hours)
May 4, 2014: Zhugan Hu Tong Community, Dongcheng District, Beijing (2 hours)
May 27, 2014: Neiwubu Street Community, Dongcheng District, Beijing (2 hours)
January to July, 2014: Shilipu South Community, Chaoyang District, Beijing (6 hours)
This is to certify that the above information is correct.
学校印鉴
July 10, 2014
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bona fide （拉丁文，多用于证明文件）“in good faith”，中文意思是“真诚的, 无欺的, 名副其实的”。
求高手翻译专业术语为英文，急急急急
1）氧化发黑 ，2）负载不通无电压氧化，3） LVLD受控不下电 ，4）低电压脱离不受控，
5）线圈内阻太小 ，6） 螺孔不良 ，7）二极管外漏 ，8）螺柱不良， 9）螺孔滑牙， 10）螺柱断接触不良 ， 11）孔位打不下去， 12）插座不能反弹（里面弹片无弹性） ，
1), black oxide, 2) the load voltage barrier-free oxidation, 3) LVLD controlled no less than electric, 4) low voltage out of control,
5) The coil resistance is too small, 6) screw poor, 7) diode leakage, 8) stud bad, 9) screw slip teeth, 10) stud off bad, 11) holes to play does not go, 12 ) socket can not rebound (which shrapnel inelastic),