bronchodilator的音標為["br?nk?udail?it?]，基本翻譯為“支氣管擴張劑”，速記技巧為“bronch=支氣管，dilate=擴張，ator=……劑”。

bronchodilator的英文詞源為：bronch(o) + dilator(使擴張的)。

變化形式：bronchospasm(支氣管痙攣)，bronchitis(支氣管炎)，bronchoconstrictor(支氣管收縮劑)，bronchodilatation(支氣管擴張)，bronchial(支氣管的)，bronchogenic(支氣管起源的)，bronchoplasty(支氣管成形術)，bronchoscopic(支氣管鏡的)。

相關單詞的意思和用法：支氣管擴張劑，用于擴張支氣管，緩解哮喘等癥狀。例如，β受體激動劑是常用的支氣管擴張劑，可以激活β受體，從而擴張支氣管。此外，茶堿類藥物也可以作為支氣管擴張劑使用。總之，bronchodilator在醫學領域中有著廣泛的應用。

以上內容僅供參考，建議到英語原語種國家查詢相關資料。

bronchodilator常用短語：

1. bronchodilator therapy 支氣管擴張劑治療

2. long-acting bronchodilator 長效支氣管擴張劑

3. short-acting bronchodilator 短效支氣管擴張劑

4. inhaled bronchodilator 吸入型支氣管擴張劑

5. beta-bronchodilator β受體激動劑

6. xanthine bronchodilator 黃嘌呤類支氣管擴張劑

7. phosphodiesterase inhibitor bronchodilator 磷酸二酯酶抑制劑

例句：

1. Long-acting bronchodilators are commonly used to treat chronic obstructive pulmonary disease (COPD). 長效支氣管擴張劑常用于治療慢性阻塞性肺病（COPD）。

2. Inhaled bronchodilators are commonly used for the treatment of asthma and chronic bronchitis. 吸入型支氣管擴張劑常用于治療哮喘和慢性支氣管炎。

3. Beta-bronchodilators are commonly used to improve lung function in patients with chronic obstructive pulmonary disease (COPD). 用于改善慢性阻塞性肺疾病（COPD）患者的肺功能。

英文小作文：

Bronchodilators are drugs that can relax the smooth muscle around the airways and improve lung function. They are commonly used to treat conditions such as asthma and chronic bronchitis.

When I was a child, I had asthma and my doctor prescribed me a long-acting bronchodilator. It helped me breathe more easily and I felt much better.

Now, as an adult, I still use a short-acting bronchodilator when I experience symptoms of asthma or chronic bronchitis. It helps me feel more comfortable and able to breathe normally.

Bronchodilators are very effective in relieving the symptoms of these conditions and can improve quality of life for many people. I am grateful for the medications that have been developed to help us manage these conditions better.