erratic
[ɪˈrætɪk]
adj.
飘忽不定的;
行为古怪，反复无常;
（运动或行为）不规则的;
n.
古怪的人;
[地]漂砾;
例句:
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Argentina's erratic inflation rate threatens to upset the plans.
阿根廷动荡不定的通货膨胀率可能会破坏那些计划。
来自柯林斯例句
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Douglas was a 29-year-old journeyman fighter, erratic in his previous fights.
道格拉斯29岁，是个技术不错的拳击手，在以前的比赛中发挥不太稳定。
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Businessmen are displeased with erratic economic policy-making.
商界人士对变化无常的经济决策很是恼火。
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He could feel his erratic pulse in his sty.
来自NEWYORKER
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Intermittent support The aid worker said international aid is erratic.
来自VOA
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Rises in temperature and erratic rainfalls have lowered crop productivity.
来自VOA