phrase, idiomatic
to hear with one's ears and see with one's eyes; to personally see and hear
工人們，農人們，全國被軍閥和外力壓迫的同胞們！二月七日長辛店和漢口的大慘殺，你們已經耳聞目見或身歷其境了。
工人们，农人们，全国被军阀和外力压迫的同胞们！二月七日长辛店和汉口的大惨杀，你们已经耳闻目见或身历其境了。
gōng rén men ， nóng rén men ， quán guó bèi jūn fá hé wài lì yā pò de tóng bāo men ！ èr yuè qī rì cháng xīn diàn hé hàn kǒu de dà cǎn shā ， nǐ men yǐ jīng ěr wén mù jiàn huò shēn lì qí jìng le ． Workers, peasants, fellow countrypeople who are oppressed by warlords and foreign powers! You might have heard about, seen, or even personally faced the massacre which took place in Changxindian and Hankou on 7 February.
Examples (Wiktionary)
Mandarin
工人们，农人们，全国被军阀和外力压迫的同胞们！二月七日长辛店和汉口的大惨杀，你们已经耳闻目见或身历其境了。
工人們，農人們，全國被軍閥和外力壓迫的同胞們！二月七日長辛店和漢口的大慘殺，你們已經耳聞目見或身歷其境了。
gōng rén men ， nóng rén men ， quán guó bèi jūn fá hé wài lì yā pò de tóng bāo men ！ èr yuè qī rì cháng xīn diàn hé hàn kǒu de dà cǎn shā ， nǐ men yǐ jīng ěr wén mù jiàn huò shēn lì qí jìng le ．
Workers, peasants, fellow countrypeople who are oppressed by warlords and foreign powers! You might have heard about, seen, or even personally faced the massacre which took place in Changxindian and Hankou on 7 February.