从头开始学learn: vt. (learned , learnt) 1.学,学 ...from: from above [below] 自上[ ...ground: ground2 n. 1.地,地面;土地,地 ...up: adv. (superl. uppermost ) 1. ...learn sth from sb: 从…学到…下载手机词典可随时随地查词查翻译