Valvetrain
气门
🗣️ 情景例句
I'd rather wait for the live show myself.
我宁愿等到有现场演出时才看。
I'm a student.
我是学生。
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。