estrin的音標為["?st?r?n]，基本翻譯為“雌激素”。

速記技巧：這個單詞的拼寫較為復雜，但是可以結合其含義進行記憶。estrin是女性體內分泌的一種激素，與“女性”和“激素”相關。可以嘗試將單詞拆分記憶，e-ste-ri-n，這樣更易于記憶。

以下是一些含有estrin詞源的單詞及其變化形式和相關單詞：

1. estrogen (名詞) - 由estrin(詞源同estrine)加上后綴-gen(來自拉丁語-gener，表示“產生”)構成。Estrogen是一種女性荷爾蒙，與月經周期和生育有關。

2. estrone (名詞) - 是estrogen的一種，是體內最強大的雌激素。其詞源與estrine和estrin相同。

3. estrus (名詞/形容詞) - 意為“發情”或“性興奮期”。這個詞源于拉丁語，意為“公牛發情”。

4. estrine (名詞) - 一種有機化合物，是雌三醇的前體，與雌激素有關。

5. estrin (名詞) - 一種與雌激素相關的化合物，由estrine派生而來。

6. estrildid (名詞) - 這是一個生物分類名稱，用于描述estrine相關的一類鳥類。

7. estrinemia (名詞) - 意為“雌激素代謝”。

8. estrinotrope (名詞) - 意為“雌激素調節劑”。

9. estrinuria (名詞) - 意為“雌激素尿癥”，是一種疾病癥狀，通常與腎臟問題有關。

10. estrinuria (動詞) - 意為“產生雌激素尿”。

以上單詞都與雌性激素和其相關生理過程有關，這些單詞的詞源和變化形式可以幫助我們更好地理解這些概念。每個單詞都有其獨特的含義和用途，有助于我們更全面地了解人體激素系統。

常用短語：

1. eat one"s words 收回說過的話

例句：He finally admitted he was wrong and ate his words.

2. give sb the cold shoulder 不理睬某人

例句：She gave him the cold shoulder when he asked for a date.

3. speak from both sides of the mouth 說話兩面三刀

例句：He always speaks from both sides of the mouth to get what he wants.

4. break the ice 打破僵局

例句：They couldn"t start a conversation because they were both nervous and breaking the ice was difficult.

5. keep one"s options open 不急于做決定

例句：He"s keeping his options open until he knows more about the job.

6. speak from the heart 真誠發言

例句：She always speaks from the heart and is very easy to listen to.

7. speak one"s mind 說出心里話

例句：I finally spoke my mind and told him how I really felt about the situation.

英文小作文：

When it comes to making decisions, we all face situations where we need to choose between two or more options. Sometimes, we may feel overwhelmed or unsure about what to do, but by keeping our options open and weighing the pros and cons of each option, we can make a more informed decision that is in our best interest.

In life, there will always be uncertainties and challenges, but by approaching them with an open mind and an open heart, we can overcome any obstacle and achieve our goals. By staying flexible and not being afraid to change course if necessary, we can steer our lives in the direction we want to go.

Therefore, I believe that it is important to always keep our options open, weigh the pros and cons of each option, and approach life with an open mind and an open heart. This way, we can make the most of our opportunities and live a fulfilling life.