Two men riding on motorcycles opened fire on him.

　　兩個(gè)騎在摩托車(chē)上的人向他開(kāi)了槍。

　　Perhaps this riding lark would be more fun than she'd thought.

　　也許這次騎馬的無(wú)聊活動(dòng)比她所想象的要好玩一些。

　　The area is well suited to road cycling as well as off-road riding.

　　這個(gè)地區很適合公路自行車(chē)競賽和越野騎馬。

　　Riding is her favorite occupation.

　　騎馬是她最喜歡的娛樂(lè )活動(dòng)。