跑步

Pinyin: pǎo bù
Meaning：To run
Sentence:  她不用学跑步技巧，她天生就擅跑。She didn't have to learn how to run: she's a natural.

More:

跑：

Pinyin: páo, pǎo
Meaning: To run; to escape
Radical: 足
Stokes: 12
Traditional: 跑
Common words/Phrase:
跑车 [pǎo chē] 【sports car】
跑道 [pǎo dào] 【track】
跑龙套 [pǎo lóng tào] 【to play a small role】
跑酷 [pǎo kù] 【parkour】
跑马 [pǎo mǎ] 【horse race】

步：

Pinyin: bù
Meaning: March; walk; a step; a pace; stages in a process
Radical: 止
Stokes: 7
Traditional: 步
Common words/Phrase:
步骤 [bù zhòu] 【move】
步行 [bù xíng] 【to go on foot】
步伐 [bù fá] 【march; pace】
步兵 [bù bīng] 【foot soldier】
步枪 [bù qiāng] 【rifle】