HSK 5
Shāngyòng fēijī bǐ sīrén fēijī dà de duō.
Commercial aircraft are much larger than private planes.
HSK 5
Gāi jìshù yǐjīng chéngshú, kěyǐ yòngyú shāngyòng.
The technology has matured and can be used commercially.
HSK 7-9
Zhè kuǎn ruǎnjiàn xūyào gòumǎi shāngyòng xǔkězhèng.
This software requires purchasing a commercial license.
