Definition: to travel over a border or line into a different area, country, etc. Level: C2
他们从阿尔巴尼亚穿过边境进入希腊。
They ___crossed from Albania into Greece.
就在我即将穿越美国边境时，我面临了最大的挑战。
It was when I was about to ___cross the U.S. border that I faced my greatest challenge.
火车每天穿越国界。
The train ___crosses the national boundary every day.
