Meaning of shī xiào:
shī xiào
失效
Verb
to fail; to lose effectiveness
Wǒ fāxiàn wǒ de hùzhào yǐjīng shīxiào.
我发现我的护照已经失效。
I discovered that my passport has already expired.
Zhège yào yǐjīng shīxiào le, nǐ xūyào zhǎo xīn de chǔfāng.
这个药已经失效了，你需要找新的处方。
This medicine has already lost its effectiveness, you need to find a new prescription.
