wèi / le / ràng / huà / miàn / hé / shēng / yīn / tóng / bù / yǎn / yuán / xū / yào / fǎn / fù / liàn / xí / duì / kǒu / xíng

为了让画面和声音同步，演员需要反复练习对口型。

To synchronize the picture and sound, the actors need to practice lip-syncing repeatedly.