“前段”造句
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 lap.
弹簧套装在螺栓的
前段.
The spring is sleeved on the front section of the bolt.