The stranded delivery driver lit a flare so the tow truck could find him.

受困的送貨司機點燃了信號彈，好讓拖吊車能找到他。

Every company vehicle must carry a roadside flare kit, according to the new safety policy.

根據新的安全規定，每輛公司車輛都必須配備路邊照明彈組。

During the harbor tour, the guide explained how ships fire flares to signal distress.

在港口導覽中，導遊說明船隻如何發射信號彈求救。