Reading is a quiet activity and it will often induce sleep in the supineposition. Especially if it's a dreary textbook or work paper.
阅读是一种很安静的活动，特别是在阅读工作文件或者阅读的内容很枯燥时，仰卧的姿势容易使人入睡。
2
Several credible studies have found that sleeping on your back - the supineposition - can double the incidence of snoring and sleep apnoea, compared with sleeping on your side.
多项可信的研究发现较之于侧卧睡觉，平躺着睡(仰卧)能让你打呼、睡眠呼吸暂停的几率翻番。
3
Due to the supineposition of the patient and the nature of the approach, however, it has its own unique set of complications.