名詞 cross section:

1. a section created by a plane cutting a solid perpendicular to its longest axis
2. a sample meant to be representative of a whole population
3. (physics) the probability that a particular interaction (as capture or ionization) will take place between particles; measured in barns

形容詞 cross section:

1. representing a plane made by cutting across something at right angles to its length
   同義詞：cross-section, cross-sectional

1. A concave molding with a cross section that approximates a quarter circle.
   飛檐的凹圓線腳截面近于九十度弧的凹線腳
2. The round, often darker cross section of such a lump as it appears on a piece of cut lumber.
   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
3. If we look at a cross section of a water wave, we may see that the wave form repeats itself at regular intervals.
   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。
4. A specific layer of soil or subsoil in a vertical cross section of land.
   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