步步

bù bù de jìn bī

步步地进逼

press forward steadily

bù bù jǐn gēn

步步紧跟

follow at every step

bù bù liú xīn

步步留心

be careful of every step

zhè běn shū yī bù bù jiào nǐ zhì zuò chuāng lián

这本书一步步教你制作窗帘。

This book gives step-by-step instructions for making curtains.