Sera
浆液, 血清\\n[医] 血清; 浆液
🗣️ 情景例句
I think it's too easy.
我觉得它太简单了。
Why?
为什么？
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。