1. 如果我們觀察水波的橫截面，我們會看到波形是按一定的間隔重復(fù)的。
   If we look at a cross section of a water wave, we may see that the wave form repeats itself at regular intervals.
2. 節(jié)疤這種突出物的橫截面，呈圓形，比周圍的地方要黑，常常出現(xiàn)在切割好的木材上
   The round, often darker cross section of such a lump as it appears on a piece of cut lumber.
3. 地層，巖層處于土地的垂直橫截面中的某一具體土層或次土層
   A specific layer of soil or subsoil in a vertical cross section of land.
4. 每個班都代表著整個社會的一個完全相當(dāng)的橫截面。
   Each class represented an identical cross-section of the community.

截的英語翻譯：

面的英語翻譯：