eff

eff的音标是/ef/，基本翻译为“效劳；出力；弄脏；欺骗”，速记技巧为“e发/e/音时，常受一个或一个以上唇化音修饰”。

eff这个词的英文词源可以追溯到拉丁语“eficere”，意为“执行，实施”。它的变化形式包括过去式“effecit”，过去分词“effecit”和“effecitur”，现在分词“efectuando”等。

相关单词：

1. effect：这个词与eff有着相似的词源，表示“实现，产生”的意思。

2. efficient：这个词来自于拉丁语“eficiente”，意为“有效率的，有成效的”。

3. effluent：这个词来自于拉丁语“efluere”，意为“流出，排放”。

4. effusion：这个词来自于拉丁语“efusus”，意为“流出，流淌”。

5. efface：这个词来自于拉丁语“efacer”，意为“抹去，消除”。

6. effervesce：这个词来自于拉丁语“effervesere”，意为“冒泡”。

7. effervescent：这个词来自于effervesce，意为“有活力的，活跃的”。

8. effigy：这个词来自于拉丁语“efigium”，意为“肖像，模拟像”。

9. effeminate：这个词来自于拉丁语“efeminatus”，意为“女性化的，柔弱的”。

10. effervescently：这个词是effervescent的副词形式，用来形容充满活力和热情。

以上十个单词都与eff有着密切的关联，并且涵盖了不同的词性和含义。这些单词在英语中广泛使用，并且具有丰富的文化背景和历史渊源。

常用短语：

1. effect on

2. in effect

3. take effect

4. come into effect

5. put into effect

6. bring into effect

7. effectuate

例句：

1. The new law will take effect next month.

2. The policy has been put into effect.

3. The doctor"s recommendations had a significant effect on my recovery.

英文小作文：

标题：Effects of a New Policy

Recently, a new policy was implemented in our company that aims to improve employee well-being and productivity. I must say, the effects have been remarkable. The new policy has had a positive impact on our work environment, leading to increased team spirit and better communication among colleagues. Additionally, employees seem to be more motivated and engaged in their work, which has led to increased productivity and efficiency. Overall, the effects of this new policy have been very positive and we are all looking forward to its continued success.