警察正在追捕小偷。
jǐngchá zhèngzài zhuībǔ xiǎotōu 。
The police are chasing the thief.
我想要成为一名警察。
wǒ xiǎngyào chéngwéi yīmíng jǐngchá 。
I want to become a police officer.
警察在街上巡逻,确保市民的安全。
jǐngchá zài jiēshàng xúnluó , quèbǎo shìmín de ānquán 。
The police patrol the streets to ensure the safety of citizens.