guard rail的音標為[?ɡɑ?rd ?re?l]，基本翻譯為“護欄；護柵”，速記技巧為：rail的發音與“railway”相近，guard表示“防護”。

Guard rail這個詞的詞源可以追溯到古英語中的“guard”和“rail”，意為“防護欄”。它的主要作用是保護行人或車輛免受道路上的危險因素（如車輛、障礙物等）的傷害。

guard rail的變化形式主要有復數形式“guards rails”和過去式“guarded rail”。

相關單詞：

1. Guard - 意為“保護”，在許多情況下，它都可以指代安全防護措施，如保安、警衛等。

2. Rail - 意為“欄桿、軌道”，在guard rail中，它表示防護欄的主要構成部分。

3. Guardrail - 是一個復合詞，意為“防護欄”，是guard和rail的合成詞，用于描述一種特定的安全設施。

4. Guarded - 意為“有防護的”，它可以用于描述某些事物具有防護措施或保護機制。

5. Restraint - 意為“約束、限制”，它可以用于描述guard rail等安全設施對行人和車輛的約束作用。

Guard rail作為道路安全設施，在許多國家都是重要的交通標志之一。它的使用可以有效地減少交通事故的發生，保護行人和車輛的安全。

guard rail常用短語：

1. on the guard rail

2. off the guard rail

3. guard railing

4. guard rail protection

5. guard rail system

6. guard rail installation

7. guard rail maintenance

雙語例句：

1. The car was hit by a truck and sent flying off the guard rail.

那輛車被卡車撞擊，從護欄上飛出去。

2. The guard railing protects pedestrians from falling off the cliff.

護欄保護行人不會從懸崖上掉下去。

3. The guard rail system on this bridge is very reliable.

這座橋上的護欄系統非常可靠。

4. The guard rail installation must be done by professionals to ensure safety.

安裝護欄必須由專業人員來完成，以確保安全。

5. We need to maintain our guard rail regularly to prevent accidents.

我們需要定期維護護欄，以防止意外發生。

英文小作文：

Safety is everyone"s responsibility, especially when it comes to guard rails. Guard rails are designed to protect us from danger, whether it"s falling off a cliff, or being hit by a car. However, they need to be maintained regularly to ensure they are effective in their job. Without proper maintenance, they can become a hazard themselves.

Guard rails are a crucial component of our infrastructure, and they should be treated as such. We should all be mindful of their presence and how they can keep us safe. After all, safety is everyone"s responsibility, and we should do our part to ensure it is always taken care of.