Major route congestion study 主线拥塞调查
major route detail 主要途径
major world air route area 世界主要航路区 ; 世界主要航空线区域
major world air route 主要世界航路
Major light rail route map 主要轻轨线路图
major cable route 主呼叫控制软件包
major cycle route 主要途径
BackgroundNumber of illegal drug users in China has increased rapidly in recent years. At present, sharing syringes and needles among injection drug users (IDUs) is a major route of transmission of human immunodeficiency virus (HIV) in China.
研究背景在我国非法药物成瘾问题日趋严重,共用注射器具静脉注射海洛因是目前我国艾滋病病毒(human immunodeficiency virus,HIV)感染的主要途径。
参考来源 - 贵州海洛因成瘾者在社区美沙酮维持治疗中的保持及其影响因素·2,447,543篇论文数据，部分数据来源于NoteExpress
At present, the spread of AIDS in China is the major route of transmission.
目前，性传播是艾滋病在中国最主要的传播途径。
The biodegradations are considered to be the major route of degradation for these widespread pollutants in environment.
生物降解是邻苯二甲酸酯在环境中降解的主要途径。
Lead can cause a wide range of disorders, including anaemia and hepatic and neurological disorders and food can be a major route of exposure.
铅可引起一系列广泛的疾病，包括贫血和肝病以及神经紊乱，而食品可能是一个重要的接触途径。
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