6月1日后，从加拿大回美国的人必须出示护照(或其他官方认可的身份证明文件)，而以前一张驾照就已足够。

Since June 1st those returning to the United States from Canada have been required to show a passport (or another approved identity document), where a driving licence was always sufficient.

youdao

6月1日后，从加拿大回美国的人必须出示护照(或其他官方认可的身份证明文件)，而以前一张驾照就已足够。

Since June 1st those returning to the United States from Canada have been required to show a passport (or another approved identity document), where a driving licence was always sufficient.

youdao