1. The election will take place against a backdrop of increasing instability. 选举的背景是逐渐不稳的局势。
2. Prices fluctuate, in response to harvests, natural disasters and political instability; and when they rise, it takes some time before new sources of supply become available. 价格会随着收成、自然灾害和政治不稳定而波动；当价格上涨时，需要一段时间才能找到新的供应来源。
3. One study of ninth-grade students found that 50 percent of friendships among ninth graders changed from one month to the next, signaling striking instability in friendships. 一项对九年级学生的研究发现，在九年级学生中，50%的友谊每个月都会发生变化，这表明友谊极其不稳定。
4. Resentment against Germanic chieftains achieving high rank in the Roman military and factionalism among Roman leaders were among the causes of the period's considerable instability. 对于日耳曼部落首领在罗马军队中获得高地位的不满和罗马领导人之间的党派之争是该时期局势剧烈动荡的一部分原因。
5. But the fact that 4 in 10 Americans can't come up with $400 in an emergency is a commonly cited statistic for good reason: economic instability stretches across race, gender, and geography. 但是，每10个美国人中就有4个在紧急情况下拿不出400美元，这个数据常被引用，理由也很充分，即经济不稳定跨越了种族、性别和地域因素。
