1
be cyclical
这里表示“循环发生的”；作表语时主语常是经济、行业或过程。
The economy is cyclical, and recessions are inevitable.
经济具有周期性，衰退是不可避免的。
周期的；循环的
先理解核心含义，再看它在真实句子里的用法。
周期的；循环的
recurring in cycles
The economy is cyclical, and recessions are inevitable.
经济具有周期性，衰退是不可避免的。
定期重复的；周期性的。
Recurring at regular intervals.
循环的；周期性的
recurring in cycles
卷成圆形的；环状卷起的。
Rolled up circularly.
The economy goes through cyclical booms and recessions.
经济会经历周期性的繁荣和衰退。
Seasonal changes are cyclical, so we can predict them each year.
季节变化是周期性的，所以我们每年都能预判。
Many industries have cyclical sales that rise and fall with demand.
许多行业的销售具有周期性，随需求起落。
这里表示“循环发生的”；作表语时主语常是经济、行业或过程。
The economy is cyclical, and recessions are inevitable.
经济具有周期性，衰退是不可避免的。
cyclical 作定语修饰名词，常与 fluctuation、swing、pattern 等搭配。
Investors should be prepared for cyclical swings in the stock market.
投资者应该对股市的周期性波动有所准备。
这个结构强调某事物按周期反复的特点。
Historians often point to the cyclical nature of political change.
历史学家常常指出政治变革的循环性。
Not this
The economy is cycle.
Use this
The economy is cyclical.
be 动词后作表语需用形容词 cyclical（周期的），不能用名词 cycle。
Not this
The seasons change cyclical.
Use this
The seasons change cyclically.
修饰动词 change 要用副词 cyclically，形容词 cyclical 只能修饰名词。
Not this
The necklace has a cyclical shape.
Use this
The necklace has a circular shape.
表示几何上的圆形要用 circular；cyclical 指时间上按周期重复，不指形状。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
周期性；循环性
The cyclical nature of the economy makes long-term planning difficult.
经济的周期性使长期规划变得困难。
周期性波动
Stock prices are subject to cyclical fluctuations.
股票价格会受到周期性波动的影响。
周期性行业
The automobile sector is a classic cyclical industry.
汽车行业是典型的周期性行业。
周期性股票
Investors often buy cyclical stocks when the economy is expanding.
投资者往往在经济扩张时购买周期性股票。
周期性失业
Cyclical unemployment rises during a recession.
经济衰退期间周期性失业会增加。
周期性复苏
The country is now experiencing a cyclical recovery.
该国目前正经历周期性复苏。
Use cyclical naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
cycle是“循环”，联想自行车轮子一圈圈转；加-ical变成形容词，cyclical就是“循环往复的、周期的”。
语域：formal 常见场景：economic reports、academic writing、business reports cyclical 是比较正式的词，多用于学术写作、经济或商业分析等书面或正式场合；日常口语中较少出现，更常用 periodic 或 cyclic。
cyclical 读作 /ˈsaɪklɪkəl/，没有常用词与它完全押韵。cycle 和 cyclone 仅仅开头有相同的 /saɪk/ 音和 cycl 拼写；typical、political、critical、practical 拼写都以 -ical 结尾，但重读元音不同，是形近音异，不是押韵。
Dictionary facts from ECDICT, WIKTIONARY.