土层 (tǔ céng) — soil layer

定義

例文

• 这个地区的土层很厚，适合种庄稼。
  Zhè ge dì qū de tǔ céng hěn hòu, shì hé zhǒng zhuāng jia.
  The soil layer in this area is very thick, suitable for growing crops.
• 地质学家正在研究地下不同土层的构成。
  Dì zhì xué jiā zhèng zài yán jiū dì xià bù tóng tǔ céng de gòu chéng.
  Geologists are studying the composition of different soil layers underground.
• 暴雨冲刷后，表层的土层流失了很多。
  Bào yǔ chōng shuā hòu, biǎo céng de tǔ céng liú shī le hěn duō.
  After the heavy rain erosion, a lot of the surface soil layer was lost.