annual runoff

annual runoff的音标为[ˈænjʊəl rʊn(ə)f]，基本翻译为“年径流”，速记技巧为：annual（年度的）+runoff（径流）→年径流。

Annual Runoff这个词的词源可以追溯到拉丁语annus（一年）和potare（煮，煮沸），表示一年一次的“流出”。这个词在英语中的形式变化相对较少，主要涉及到复数形式Annual Runoffs和过去式、过去分词形式Annualized Runoff。

相关单词：

1. Runoff Elections：选举，通常指在大选日之后的补选，通常在候选人得票未过半的情况下进行。

2. Annualized：表示每年重复或类似的情况，例如annualized salary表示年薪。

3. Runoff：除了annual runoff外，还有排水道的意思，在农业中表示农田排水。

4. Runoff Season：雨季，指降雨量较大的季节。

5. Runoff Model：一种水文学模型，用于模拟径流过程。

以上这些单词都与Annual Runoff这个词有着密切的联系，体现了自然科学的词汇中常见的抽象化和多义性。

常用短语：

1. annual runoff budget

2. annual runoff flow

3. annual runoff volume

4. cumulative annual runoff

5. long-term annual runoff

6. short-term annual runoff

7. annual runoff ratio

例句：

1. The annual runoff of the river has increased by 20% due to environmental protection measures.

2. The company"s cumulative annual runoff has exceeded its original plan by 5%.

3. The long-term annual runoff of the region is expected to increase by 5% due to the construction of a new dam.

4. The short-term annual runoff of the reservoir is expected to be stable at around 50 million cubic meters.

5. The annual runoff ratio of the company"s products has exceeded 90%.

6. The annual runoff of the rainforest is so large that it can be used to feed a large city for a year.

7. The amount of water in the river has decreased due to a decrease in the annual runoff.

英文小作文：

Water Resources Management: The Importance of Annual Runoff

Water resources management is crucial for sustainable development, and one of the key factors is the annual runoff of rivers and lakes. Annual runoff refers to the amount of water that flows into a river or lake from various sources during a certain period of time, which determines the amount of water available for use by humans and other living beings. If the annual runoff is too low, it may lead to water scarcity and affect human activities such as agriculture, industry, and domestic use. On the other hand, if the annual runoff is too high, it may cause flooding and other hazards, which can also affect human lives and property. Therefore, effective water resources management requires a comprehensive understanding of the annual runoff and its variations, which can be used to predict future water supply and demand, develop appropriate water management plans, and ensure sustainable development of water resources.