tā / shuō huà / shí / bù xiǎo xīn / dài chū / le / zāng zì / ràng / chǎng miàn / biàn dé / hěn / gān gà他说话时不小心带出了脏字,让场面变得很尴尬。He accidentally let slip an obscenity while speaking, making the situation very awkward.