1.Lumbar DS is a major cause of spinal canal stenosis and is often related to low back and leg pain.
腰椎的退行性滑移是导致椎管狭窄的一个主要原因，并常与腰腿痛密切相关。
2.The report says hearing loss is not just a natural result of the aging process. The major cause is noise.
该报道称，失聪不仅仅是年龄增长的自然结果，主要原因是噪音。
3.In the [college] age group, accidents are a major cause of morbidity, and alcohol is often involved in some fashion.
在（大学）同龄人中，意外是发病的主要因素，而究竟也常被认为是时尚的。
4.VOCs are believed to be a major cause of headaches, stress, lethargy, sore eyes and respiratory problems.
VOCs被认为是导致头疼、压力、无精打采、眼睛酸痛和呼吸系统问题的主要原因。
5.The illegal narcotics trade is said to be a major cause of instability in Afghanistan and is believed to be funding Taliban insurgency.
非法毒品贸易被认为是造成阿富汗局势动荡的一个主要原因，也是塔利班武装的资金来源。
6.Road maintenance in Sichuan, which reduced traffic capacity, is the major cause of the massive jam, said the report.
据悉，堵车原因主要是四川境内部分路段维修，导致通行能力减弱。
7.It is the conflict between Persona and Self that leads to her dual character which is the major cause for her tragic life.
人格面具与自性之间的矛盾导致其双重性格的产生，而她的双重性格是导致其悲剧生活最主要的内在因素之一。
8.She said a major cause of the extinctions are plants and animals not native to Hawaii.
她说非夏威夷本土的动植物引入是促使物种灭绝的主要原因。
9.The disappearance of money out of thin air is the major cause of an economic bust.
凭空制造出来的货币的消失是经济崩溃的主要原因。
10.CCS is only being proposed for power stations - which are a major cause of anthropogenic greenhouse gas emissions.
目前CCS只是被推荐给发电站，因为他们是主要人为温室气体排放的来源。