Correct

笔直

/ bǐzhí / 
Strokes

Definition

perfectly straight/straight as a ramrod/bolt upright

Example

As an Adjective

perfectly straight; bolt upright

1
Bǐzhí
笔直
de
的
dàolù
道路

straight road

2
Yāogǎnr  
腰杆儿
bǐzhí
笔直

be ramrod straight

3
Shēnzǐ
身子
tǐng
挺
de
得
bǐzhí
笔直

draw oneself up to one's full height

4
Zuò
坐
de
得
bǐzhí
笔直

sit up straight

5
Zhàn
站
de
得
bǐzhí
笔直

stand bold upright; stand straight as a ramrod