n. 管,管状物;电子管;地铁;电视机;
vt. 把…装管;把…弄成管状;用管输送;
vi. 乘地铁;不及格;
tub- 表”管道”
🗣️ 情景例句
I recently broke up with my boyfriend. I was really bummed out.
最近我和男朋友分手了。我真沮丧。
He speaks English fluently.
他讲英语很流利。
Up to now, historians have assumed that calendars came into being with the advent of agriculture, for then man was faced with a real need to understand something about the seasons.