立案的英文：
put on record; register

参考例句：

I heard that the procuratorate has placed a case on file to investigate him.
听说检察院已经对他进行立案审查了。

A people's court shall pass a judgment of first instance within three months from the day of filing the case.
人民法院应当在立案之日起三个月内作出第一审判决.

A people's court shall send a copy of the bill of complaint to the defendant within five days of filing the case.
人民法院应当在立案之日起五日内,将起诉状副本发送被告.

put是什么意思：
v. 放，置，使处于；表达，说明

put a crimp into
妨碍|束缚

Put on the screw
施加压力

strike [ put on ] a pose of
装出...面貌[样子]

record是什么意思：
n. 记录；履历；档案
v. 记录；录下；被录下

A stereo recording,record,cassette,system
立体声的录音、唱片、盒式磁带、音响设备.

The tape-recorder has recorded his voice and the camera has recorded his features.
录音机录下了他的声音，摄影机留下了他的形象。

A word in a record header that contains a count of the words in the record
记录首部中的一个字，它包含该记录的字计数。

register是什么意思：
n. 登记；注册；记录；登记薄；自动记录器；寄存器
v. 登记；注册；记录；正式提出；指示；表达；流露；留下印象；挂号邮寄

register signal
记录器信号

bond registered
登记注册的记名债券

register of voice
嗓音声区