Optical altimeter
[机] 光测高度计
🧩 词语组成解析
n. 高度计\\n[化] 测高仪
🗣️ 情景例句
They hardly ever see each other.
他们几乎彼此不碰头。
I seldom write a letter.
我很少写信。
but more often than not, the greater part of the journey is spent on roads with few service stations and too much traffic.
但旅行的大部分时间都花在路上，而且只有很少的服务设施，交通也很拥挤。