You can assess flatness on the lateral view by estimating that the hemidiaphragm is 1.5 centimeters above the line connecting the costophrenic angle posteriorly and sternophrenic angle anteriorly.

可以通过侧位片评估扁平度，正常情况下，膈肌比后方肋膈角与前方胸膈角连线高1.5厘米。

So, first of all, this section here above the line are all the words which are - the R is pronounced, and below the line, where they're not pronounced, the R is not pronounced.

所以，首先，在线上方的这部分是所有单词 - R 发音，在线下方，在不发音的地方，R 不发音。