drop out

1.He dropped out of college and became a beach bum.

他从大学退学，整天在海滩闲逛。

2.They have dropped out of society.

他们已经退出社交圈。

3.After the crash,onlookers said that the plane had suddenly dropped down out of the sky.

飞坠毁后旁观者说飞然从天上掉下的。

4.After dropping out of college, KITANO knocks on the door of France-za, a striptease theater in Asakusa, and begins his training as a vaudevillian.

这一齣以的自传，重现其少年时代的影片。

5.The problem of dropping out in countries' junior school has become the important factor to feaze basic education and to carry out full diathesis education in this period.

农村初中学生辍学问题，已经成为现阶段严重困扰我国基础教育和全面实施素质教育的重要问题。