deleterious的音標為[?d?l??t??s]，基本意思是“有害的；致殘的；惡性的”。其速記技巧為：聯想記憶，將“deleterious”拆分為“de（去掉）＋leter（字母）＋ous（形容詞后綴）”，表示去掉字母后變得有害。

"deleterious"這個詞的詞源可以追溯到拉丁語"delectus"（被挑選的）和"littera"（字母），組合起來表示被挑選出來的有害的。這個詞在英語中的使用已經有一百多年的歷史。

變化形式：

過去式：deteriorated

過去分詞：deteriorated

現在分詞：deteriorating

相關單詞：

1. "contaminate" - 這個詞和"deleterious"有相似的含義，都表示有害的，可以互相替換使用。

2. "toxic" - 這個詞表示有毒的，也可以用來描述有害的物質或環境。

3. "malicious" - 這個詞表示惡意的，可以用來描述有害的行為或言語。

4. "harmful" - 這個詞是最常用的描述有害的詞匯之一，可以用來描述各種有害的事物。

5. "poisonous" - 這個詞表示有毒的，也可以用來描述有害的生物或環境。

6. "deleterious effect" - 這個短語可以用來描述有害的影響或效果。

7. "deleterious substance" - 這個短語可以用來描述有害的物質或元素。

8. "deleterious agent" - 這個詞組可以用來描述有害的物質或因素，通常用于科學或醫學領域。

9. "deleterious environment" - 這個短語可以用來描述一個對生物有害的環境。

10. "deleterious behavior" - 這個詞組可以用來描述有害的行為或習慣。

常用短語：

1. deleterious effect

2. harmful effect

3. adverse effect

4. toxic effect

5. damage to health

6. harm to body

7. negative impact

例句：

1. Exposure to toxic substances can have deleterious effects on the human body.

2. Overexercising can have a harmful effect on your joints.

3. Poor diet and lack of exercise can have adverse effects on your health.

4. The drug has a toxic effect on the liver.

5. The damage to the environment caused by deforestation is irreversible.

6. Smoking can harm your body and increase your risk of various diseases.

7. The negative impact of social media on mental health is becoming increasingly apparent.

英文小作文：

Deleterious Effects of Poor Habits

Habits can have a profound impact on our lives, whether positive or negative. Smoking, overeating, lack of exercise, and other unhealthy habits can have deleterious effects on our physical and mental health. Exposure to toxins and other harmful substances can also have adverse effects on our bodies, leading to various diseases and conditions.

On the other hand, healthy habits such as regular exercise, a balanced diet, and sufficient sleep can have a positive impact on our overall well-being and long-term health. It is therefore essential to be mindful of our habits and make conscious efforts to adopt healthy ones to ensure a happy and fulfilling life.