The piano was perfected in the early eighteen century ;钢琴的完善和制成是在 18世纪早期
by a harpsichord maker in Italy. ;由意大利一位伟大的键琴 制作者.
pilot
pilot
An airline pilot must be alert at all times. ;飞行员必须时刻保持 警惕.
The captain piloted the ship through the canal. ;船长引领船只通过运河.
previous
Enough materials should be collected previous to writing. ;写作之前要收集足够的 材料.
prosperous
After the end of the Second World War, ;“二战”后
America and Americans were prosperous beyond the dreams of the Europeans and Asians ;战后的美国和美国人的 兴旺成为欧洲和亚洲人 梦寐以求的目标,
whose economies the war had destroyed. ;因为战争毁掉了他们的 经济.
refresh
A cold drink refreshed me after my long walk. ;走了很长一段路之后,一 杯冷饮使我恢复了精神.
Enough time should be left for sleep because that will help one become refreshed. ;应该留足够的时间睡觉, 因为那有助于精力恢复.
risk
risk
Anyone who smokes is risking his health. ;谁抽烟谁就是在危害自己 的健康.
The economy will fall further,putting more jobs at risk. ;经济将进一步滑坡,使更 多人遭受失业的危险