With the popularity of the car, registration became a must in 1903 with the Motor Car Act.

随着汽车的普及，1903年出台的《机动车法案》规定购车必须注册。

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He was caught in the act of stealing a car.

他偷汽车时被当场逮个正着。

《牛津词典》

Police caught the car bangers in the act.

警方将这些汽车窃贼当场抓获。

youdao

This week,a car bomb in Peshawar was the country's single deadliest act of terrorism since 2007.

VOA: standard.2009.10.30

Her clothes hung over the shopping cart make me suspect that the Google car caught her in the act of bathing.

FORBES: Cruel World Laughs At Naked Floridian Woman Caught by Google Street View Cameras

Every day Mr. Dutschke would put a new sign up only to find it removed, until one early morning Mr. Dutschke waited in his car near the location to catch the perpetrator in the act.

WSJ: New Suspect in Ricin-Letters Case to Appear in Court

An unnamed car company invited owners to a social networking site and then proceeded, in the words of one owner, to act very corporately.

FORBES: Banks Lag Behind Government When it Comes to Social Media