基本解释

• [农业科学]底等高线

英汉例句

双语例句

• Hadhe monitored his air supply better, he could have made a slow, safeascent to the surface by following the bottom contours and swam rightup to the beach.
  如果他更好的掌握好用气量，他就可以缓慢的、更安全的沿着水底的轮廓上升出水，并直接游回岸边。

专业释义

农业科学

• 底等高线