wǎng / shàng / fā / yán / yào / jǐn / shèn / huò / cóng / kǒu / chū / yǒu / xiē / huà / yī / dàn / shuō / chū / jiù / wú / fǎ / wǎn / huí

网上发言要谨慎，祸从口出，有些话一旦说出就无法挽回。

Be careful when posting online; careless words can cause trouble, and some things cannot be taken back once said.