Trackwalker
n. <美>[铁]保养或检查铁路的人员
🗣️ 情景例句
At four o'clock,
四点钟，
Besides the required courses, I'm taking an elective in the Lab Science.
除必修科目外，选修科目我选了实验科学。
I'd like to have my boss go through the plant some day.
我真想叫我老板哪天也过来看看。