at a stroke

at a stroke 的音标为 [æt ə stɔːk]，翻译为“一下子，立即”。

基本翻译为“一挥而就，一下子完成”。

速记技巧为：可以记为“一扫”。这个技巧可以帮助我们快速记忆和拼写单词，同时也反映了单词的含义。

at a stroke 的英文词源为：拉丁语 "ad unum"（一）和 "tremere"（颤抖）。

变化形式为：单数形式为 "stroke"；复数形式为 "strokes"。

相关单词有：

1. stroke (v.) - 意为“击打，敲打”，源于中世纪英语 "stroke"，这个词直接由拉丁语 "tremere" 派生而来，表示“颤抖”的动作。

2. strike (v.) - 意为“突然袭击”，源于古英语 "stircian"，这个词也直接由拉丁语 "tremere" 派生而来，表示“打击”的动作。

3. impact (n.) - 意为“冲击力”，源于拉丁语 "impunctare"（刺入），这个词在英语中用来表示物体之间碰撞或接触所产生的力量。

4. stroke (n.) - 意为“一笔，一笔草”，源于古英语 "stircian" 的引申义，表示“快速地划过”。

5. stroke (n.) - 意为“中风”，源于拉丁语 "tremere" 的引申义，表示“颤抖”或“痉挛”。

以上这些单词都与 at a stroke 这个词组有着密切的关联，它们都反映了人类在语言中对于动作和力量的表达方式。这些单词在英语中仍然被广泛使用，并且它们的变化形式和词源也反映了英语语言的发展和演变。

短语：

1. at a stroke

2. in a flash

3. all of a sudden

4. in a twinkling

5. in a moment

6. in a flash of lightning

7. in a flash of inspiration

例句：

1. She made a decision at a stroke and never looked back.

2. The idea came to me in a flash, and I immediately wrote it down.

3. All of a sudden, the doorbell rang.

4. He reacted in a moment, grabbing his gun and shooting the intruder.

5. The money was gone in a flash of spending.

6. The light bulb went on in my head in a flash of inspiration.

7. The sculpture took shape in a flash of lightning.

英文小作文：

At a stroke, life changes forever

Life is full of unexpected moments that can change everything in an instant. One moment, you"re going about your daily routine, and the next, everything has changed. It could be a sudden realization, a flash of inspiration, or even a flash of lightning that transforms your world.

Take for example my friend, John. One day, he was just going about his normal workday, but then something unexpected happened. He had an epiphany about his career path and made a decision at a stroke. From that moment on, his life took an entirely new direction. He left his job and started his own business, and now he"s happier than ever.

Another example is my sister, who had always dreamed of traveling the world. One day, she had an idea to travel to Africa, and she made it happen in a flash of inspiration. She booked her flights and packed her bags, and now she"s living her dream.

These moments show us that life is full of opportunities that can happen at any moment. It"s up to us to seize those moments and make the most of them. After all, life is short, and you never know what the next moment will bring. So, when those unexpected moments come knocking, open the door and let them in. You never know what could happen at a stroke!