“自行侦查”一语，在司法实践中有很广泛的运用，如检察机关常说的“自侦部门”、“自侦案件”等。如此说法，出于表达习惯或方便表述，在非正式场合倒也不妨一用。但在书面上或正式场合则不宜使用。原因就在于，这些说法都是对自行侦查概念的误用。自行侦查是一个法律用语，? The term “self-detection” has a very wide range of applications in judicial practice, such as “self-investigation departments” and “self-detective cases” often said by procuratorial organs. To put it this way, for reasons of expression or convenience, it may be useful in informal settings. However, they should not be used in writing or on formal occasions. The reason is that these statements are misuse of the concept of self-detection. Self-detection is a legal term,?