adj.在肩(背)上；騎在肩(背)上
adv.在肩(背)上地；騎在肩(背)上地
n.背負(fù)式運(yùn)輸
vt.背；附帶發(fā)生
=pickaback.
Doug gave all the children a piggyback ride. 道格讓所有的孩子在他背上騎了一回馬。
If only my father would give me a piggyback. 這時(shí)候真希望我爸能把我背上。
