eighty

eighty的音标是[ˈeɪfti]，基本翻译是八、八十，速记技巧是：8谐音为“八”；ty用2代替。

Eighty的英文词源为拉丁语词“octo”，意为“八”。其变化形式包括其复数形式“octo或octades”，以及其过去分词“octum”。

相关单词：

“octuple”意为八倍的，其词源与“octo”有关。它通过添加前缀“co-”和后缀“-ple”构成，表示“八个的组合”。

“octave”意为八音阶，也与“octo”有关。它源于音乐术语，表示第八个音阶。

“octanol”是一种有机化合物，其化学式为八元环。它由八个氢原子组成，因此得名。

“octane”是汽油的化学成分，具有提高发动机效率和耐久性的作用。它与“octanol”有关，表示八碳原子的化合物。

“octant”意为八分之一的部分或区域，源于其词源“octo”和“-nt”。它表示将三维空间或平面划分为八个等份之一。

“octane-rating”意为降低汽油辛烷值，通常通过添加添加剂或改变汽油成分来实现。这个词源于“octane”和“rating”，表示评估或评价辛烷值的过程。

“octogenarian”意为八旬老人，其词源与“eighty”有关。它由“octo-”和“genius”结合而成，表示八十岁的老人。

“octupleX”是一个俚语表达，意为八倍的X次方，通常用于描述数量或金额的巨大增长。它源于数学术语，与“octuple”有关。

“octuple-entry bookkeeping”是一种会计方法，要求在同一账簿中记录多次交易。它的词源与“octuple”有关，表示记录八次交易的过程。

“octillion”是一个数学术语，表示十的八次方。它源于拉丁语“octo”，表示八个，加上后缀“-illion”。这个词通常用于描述数量极其巨大的情况。

总的来说，“eighty”在英语中有着丰富的词源、变化形式和相关单词，这些单词不仅反映了其词源“octo”，还涉及到了数学、音乐、化学、物理等多个领域。

常用短语：

1. eighty-one

2. eighty-seven

3. eighty years old

4. eighty-five percent

5. eighty-two percent

6. eighty-three point seven

7. eighty-four point five

例句：

1. She is now eighty years old and still going strong.

2. The project achieved an 87% success rate.

3. The exam results were 85% above the expected level.

4. The percentage of the population over the age of eighty is increasing rapidly.

5. The score was 82 points out of 100.

6. The cost of living is 83% higher than it was ten years ago.

7. She is 84 point five years old and still active in her work.

英文小作文：

When I think of my life, I realize that I am now in my golden years, with eighty years having passed since my birth. Looking back on my past, I remember the joy of childhood, the excitement of adolescence, and the challenges of adulthood. But what I remember most are the friendships and relationships that have been formed along the way. These relationships have given me strength and support when times were tough, and they have enriched my life in ways that cannot be measured by numbers or statistics.

As I look ahead, I am filled with hope and optimism. Although my body may be aging, my spirit remains young and vibrant. I am still able to contribute to society, to make a difference in the lives of others, and to experience the joy of new relationships and friendships. I am grateful for every moment of my life, and I am excited about what the future holds for me and for those whom I will meet along the way.