“前段”的英语？

前段提出的范围问题的答案是显而易见的.The answer to the scope question posed in the previous paragraph is an obvious one.引流肺上叶的肺前段, 把枕头放在你的腿上,让小儿仰卧在枕头上.To drain upper lobes , anterior segments, place the child supine on a pillow in your la...