[1] Qt Linguist Manual: TS File Format | Documentation | Qt Project ( 版) <http://qt-project.org/doc/qt-4.8/linguist-ts-file-format.html>
[2] Qt Linguist Manual: Translators | Documentation | Qt Project ( 版) <http://qt-project.org/doc/qt-4.8/linguist-translators.html>
TS translation source files
are human-readable XML files containing source phrases and their translations. These files are usually created and updated by lupdate and are specific to an application.
[3] Qt Linguist Manual: TS File Format | Qt Linguist Manual ( 版) <http://doc.qt.io/qt-5/linguist-ts-file-format.html>