他因为受伤，必须用拐杖走路。
tā yīnwèi shòushāng ， bìxū yòng guǎizhàng zǒulù 。
He has to use crutches to walk because of his injury.
在公园里，我看见一个老人使用拐杖。
zài gōngyuán lǐ ， wǒ kànjiàn yígè lǎorén shǐyòng guǎizhàng 。
In the park, I saw an old man using a crutch.
拐杖可以帮助行动不便的人。
guǎizhàng kěyǐ bāngzhù xíngdòng bùbiàn de rén 。
A crutch can help people who have difficulty moving.