Tā / fǎnfù / liànxí / tàikōngwǔbù / zhōngyú / zhǎngwò / le / xiànghòu / huáxíng / de / jìqiǎo

他反复练习太空舞步，终于掌握了向后滑行的技巧。

He practiced the moonwalk repeatedly and finally mastered the technique of sliding backward.