剧目: theatrical piece (play or opera), repertoire, list of plays or operas...
退回: to return (an item), to send back, to go back...
半路: halfway, midway, on the way...
合计: to add up the total, to figure what sth amounts to, to consider...
流畅: flowing (of speech, writing), fluent, smooth and easy...
物理: physics, physical...
充电器: battery charger...
