隐形成本往往比账面支出更难控制。Yǐnxíng chéngběn wǎngwǎng bǐ zhàngmiàn zhīchū gèng nán kòngzhì.Hidden costs are often harder to control than expenses shown on the books.
童话里的小精灵披上斗篷就能隐形。Tónghuà lǐ de xiǎo jīnglíng pī shàng dǒupéng jiù néng yǐnxíng.In fairy tales, a little elf becomes invisible just by throwing on a cloak.
照片上的隐形水印能有效保护版权。Zhàopiàn shàng de yǐnxíng shuǐyìn néng yǒuxiào bǎohù bǎnquán.An invisible watermark on a photo can effectively protect copyright.