深入敌后

penetrate enemy lines

深入现场

penetrate the scene

深入社会

penetrate society

深入下层

go deep into the lower levels

深入群众

penetrate the public

深入到火热的斗争中去

go deep into the seething struggle

深入人心

be deeply rooted among the people

运动继续深入。

The movement continues to deepen.

海湾深入海岸。

The gulf goes deep into the shore.

深入钻研

thorough study

深入检查

thorough examination

工作不深入

the work is not done thoroughly

了解问题不够深入。

The understanding of the issue is not thorough enough.