Backsight
n. 后视, 表尺缺口
🗣️ 情景例句
Santa Clara? OK. That's about 20 miles away.
圣塔克莱拉？好的，大约是20英里远。
I want to reserve a room.
我想预订一个房间。
I can lend you one and a few pieces of equipment.
我可以借给你一顶帐篷和几样装备。