目前是美国棒球季节，全国棒球大联盟（Major Leagure Baseball）比赛正进行得如火如荼，借此机会介绍一个和棒球相关的常用短语。

To throw a curve / To throw someone a curve (curveball)

1. To pitch a curveball to someone in baseball
2. To confuse someone by doing something tricky or unexpected, to surprise someone with something that is difficult or unpleasant to deal with

在棒球比赛中，throw a curve的意思是投球手投出一个弧线球（curveball）。弧线球对于击球手来说是个噩梦，因为弧线球很难打，容易将击球手淘汰出局。这个短语在棒球运动之外的意思通常指突如其来，意料之外的事情发生在某人身上，或者是用意料之外的事情让某人措手不及，无法应对。

造句：

1. The pitcher threw John a curve, and John swung wildly against thin air. （投球手向约翰投出一个弧线球，约翰拼命一挥但是落空了。）

2. If we put our trust in Jesus Christ, then we can still have peace and joy even when life throws us a curveball. （若是我们把信心建立在耶稣基督里，那么即使当生命中有突如其来之事发生时，我们仍能有平安和喜乐。）