pǎo / bù / qián / yào / chōng / fèn / huó / dòng / gǔ / sì / tóu / jī / bì / miǎn / xī / gài / shòu / shāng跑步前要充分活动股四头肌,避免膝盖受伤。Before running, warm up your quadriceps thoroughly to avoid knee injuries.