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expectancy of sth
The expectancy of a promotion kept him motivated.
对晋升的期待使他保持动力。
期待，期望
先理解核心含义，再看它在真实句子里的用法。
期待，期望
the feeling or state of expecting something to happen
The expectancy of a promotion kept him motivated.
对晋升的期待使他保持动力。
指对某事发生的期待或预期状态
期望或期待；期待的状态
Expectation or anticipation; the state of expecting something.
被期待的状态
The state of being expected.
未来的占有或享受权益
Future interest as to possession or enjoyment
期望值；预期价值
expectation; expected value
Life expectancy has increased significantly over the past century.
过去一个世纪，预期寿命显著增长。
There was a sense of expectancy in the audience before the concert began.
音乐会开始前，观众中充满了期待感。
The doctor outlined the expectancies for recovery after surgery.
医生概述了手术后康复的预期情况。
The expectancy of a promotion kept him motivated.
对晋升的期待使他保持动力。
They waited in expectancy of good news.
他们期待着好消息而等待。
固定短语，指平均预期寿命。
Life expectancy has increased significantly.
预期寿命显著增加。
Not this
I have high expectancies for this project.
Use this
I have high expectations for this project.
在英语中，"expectancy" 通常作为不可数名词使用，表示“期望”的状态或总体概念；而表示多个具体的期望时，应用可数名词 "expectation"。错误句子将 "expectancy" 当作可数名词并用复数形式，应改为 "expectations"。
Not this
She is very expectancy about the test results.
Use this
She is very expectant about the test results.
"Expectancy" 是名词，不能用作形容词描述人的状态；表达“充满期待的”应使用形容词 "expectant"。错误句子混淆了词性，将名词当作形容词使用。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
预期寿命
The life expectancy in that country has increased dramatically.
那个国家的预期寿命大幅提高。
巨大期望
The crowd waited with great expectancy for the announcement.
人群带着巨大的期望等待着 announcement。
高期望
There is a high expectancy of rain this weekend.
这个周末下雨的期望很高。
期待地
She looked at the gift with expectancy.
她期待地看着礼物。
成功的期望
The team's expectancy of success was high.
团队对成功的期望很高。
预期寿命
The life expectancy in that country has increased significantly.
那个国家的预期寿命显著增加了。
预期寿命
The expectancy of life varies greatly between different regions.
不同地区的预期寿命差异很大。
期待，期望
She waited in expectancy of good news.
她满心期待好消息。
Use expectancy naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
期待（expect）某事发生，心中充满期望（expectancy）。
[object Object]
Words ending in -ancy share the spelling pattern. Genuine rhymes with 'expectancy' (stress on second syllable) include 'ascendancy'. Others like 'pregnancy' (first-syllable stress) have a different stressed vowel and do not rhyme, though the unstressed ending is similar.
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.