Free Rider的音標為[fri??e?t??]，基本翻譯為“免費乘車者；免費騎車者”。

速記技巧：可以將單詞拆分記憶，如“free（免費）+ rider（騎行者）”。

Free rider這個詞來源于英語，其詞源可以追溯到古英語中的“frīe”（自由）和“rydgār”（騎手）。它的含義是指那些不支付費用而享受其他人勞動成果的人。

Free rider的變化形式主要有名詞和形容詞兩種。作為名詞時，它可以表示“免費搭車的人”，而作為形容詞時，它表示“不支付費用而享受別人勞動成果的”。

相關單詞方面，以下是一些與free rider相關的單詞，每個單詞都提供了英文詞源和解釋，以及相關描述：

1. Free market（自由市場）：一個由自由競爭和自由交易組成的市場，人們可以在其中自由選擇商品和服務，而不受限制或歧視。

2. Friction（摩擦）：一種物理現象，指兩個物體表面之間的相互作用，導致能量損失并產生阻力。

3. Freeze（凍結）：在英語中，這個詞通常指將某物或某人置于靜止狀態，不再改變或發展。

4. Frequency（頻率）：在物理學中，頻率是指一個周期性事件發生的次數。

5. Freeze frame（凍結幀）：在電影或視頻中，凍結幀是指將某個瞬間固定下來，以便更好地觀察和理解。

6. Freezer（冷凍機）：一種用于冷凍和保存食品和物品的設備。

7. Free-for-all（混戰）：在英語中，這個詞通常指一場混亂的戰斗或競爭，沒有明確的規則或領導者。

8. Free-floating（自由浮動的）：形容某物或某人的狀態，沒有固定的位置或歸屬感。

9. Freewheel（自由行駛）：在汽車或自行車等交通工具中，自由行駛是指車輛在沒有控制的情況下自行行駛一段距離。

10. Freewill（自由意志）：在哲學和宗教中，這個詞通常指人類有能力自主地做出決定和選擇，而不受外界的強制或限制。

常用短語：

1. free ride on someone"s back

2. free spirit

3. free market

4. free speech

5. free trade

6. free lunch

7. free hand

例句：

1. He always free rides on his parents" hard work.

2. She is a free spirit who enjoys life to the fullest.

3. The free market has led to more competition and better products.

4. Everyone has the right to free speech, but not everyone uses it wisely.

5. We need to promote free trade to benefit our economy.

6. I don"t believe in the free lunch, I work hard for what I have.

7. The government should give the people a free hand in running their own affairs.

英文小作文：

Free Ride on the Back of Others

Life is full of unexpected situations, and one of them is the phenomenon of free riders who take advantage of others" efforts without contributing anything themselves. These individuals often enjoy the fruits of others" hard work without putting in any effort themselves, which can be frustrating for those who are willing to work hard and contribute to society.

On the other hand, we should also recognize that there are times when we ourselves are the ones being taken advantage of by others. In this case, we need to be aware of our own responsibilities and take action to protect our rights and interests.

Ultimately, we all have a role to play in society, whether we are the ones being taken advantage of or the ones taking advantage of others. It is only through cooperation and mutual respect that we can create a better society for ourselves and our fellow human beings.