estrous

estrous的音标是["ɪstrʊəs]，基本意思是“发情的，情热的”。

速记技巧：可以尝试使用音标记音，或者结合单词的拼写和发音规则来记忆。

Estrous, 源于拉丁语，意为“月经期”。其变化形式包括 estrous cycle（发情周期）、estrus（发情期）、proestrus（间情期）等。

相关单词：

1. Ovulation（排卵）：排卵是月经周期中的一环，通常在排卵期间，雌性动物会表现出强烈的交配欲望。

2. Menstruation（月经）：月经是女性特有的生理现象，每月一次，通常在排卵后约一周开始，持续约3-7天。

3. Pregnancy（怀孕）：当雌性动物受孕时，其发情周期会发生变化，停止排卵并开始为孕育胎儿做准备。

4. Luteinization（黄体化）：在月经周期的后期，排卵后的卵泡会转化为黄体，黄体化是这一过程的一部分。

5. Estrus hormone（雌激素）：雌激素是一种重要的荷尔蒙，在发情期和月经周期中起关键作用，刺激生殖器官的发育和功能。

这些词都与生殖和月经周期有关，是生物学和医学领域的重要概念。它们的理解和使用对于理解人类和动物生殖生理过程至关重要。

常用短语：

1. in heat

2. estrus cycle

3. heat cycle

4. heat stress

5. heat exhaustion

6. heatstroke

7. ovulation

双语例句：

1. She is in heat and is restless and irritable.

2. She is going through the estrus cycle and her behavior has changed.

3. The heat cycle can be very tiring and requires plenty of water and rest.

4. Heat exhaustion and heatstroke are serious health problems that require immediate medical attention.

5. Ovulation is the process by which an egg is released from the ovary and can lead to pregnancy if intercourse occurs at the right time.

英文小作文：

The Estrous Cycle: A Key Part of Animal Life

The estrus cycle is a crucial aspect of the life cycle of many animals, including humans. It is a time when female animals become fertile and are most likely to conceive, while males become more interested in mating. This cycle is marked by changes in behavior, body temperature, and other physical characteristics, making it easy to identify when a female is in heat. Understanding the estrus cycle and when it occurs is essential for maintaining healthy relationships between animals and ensuring the survival of the species.