shí jì shàng
他说听懂了，实际上并没有懂
tā shuō tīng dǒng le, shíjì shàng bìng méiyǒu dǒng
He said he understood, but actually he didn't understand
她看起来不过二十四五岁，实际上已经三十出头了。
tā kàn qǐlái bùguò èrshísìwǔ suì, shíjì shàng yǐjīng sānshí chūtóu le.
She looks only twenty-four or twenty-five years old, but actually she's already in her early thirties.