Valvetrain
气门
🗣️ 情景例句
Are you a Republican, or a Democrat?
你是共和党人还是民主党人？
Why did't you go home?
为什么你不回家？
He has been able to tell us more about active volcanoes than any man alive.
他能告诉我们的有关活火山的情况比任何在世的人都要多。