冷默只是掩饰内心的孤独
[lĕng mò zhĭ shì yăn shì nèi xīn de gū dú]
'Cold silence is just a disguise for inner loneliness' indicates someone who pretends to be indifferent to cover up their feeling of being alone. '冷' stands for 'cold', '默' means keeping silence. Both suggest an introvert personality or attitude while '内心' (inner) '的孤独'(loneliness) reveals what truly haunts the holder.