depth

n.

1. 深度，厚度[U][C][S1]
   The young man dived to a depth of 40 feet.

   那个青年人潜到四十英尺的深度。

   The ice is ten feet in depth.

   冰有十英尺深。

2. （色泽）浓度；（音的）低沉[U][S1]
3. （知识等的）深奥；（感情等的）深厚[U][S1]
   We have expressed the depth of our gratitude to them.

   我们向他们表示了深切的谢意。

4. 深处；深渊[the P]
   Scientists used to believe that there was no life in the depths of the ocean.

   科学家过去认为海洋深处没有生物。

   He ventured into the depths of the forest.

   他大胆地走进树林深处。

5. 中间部分；最强烈部分[the P]
   An air-raid alarm sounded in the depths of night.

   深夜响起了空袭警报。