closely的音標是[?kl??sli]，基本意思是“緊密地，親密地，接近地”，可以表示在空間上、時間上或程度上的接近。速記技巧是可以通過發音規律記憶該單詞。

closely這個詞的詞源可以追溯到古英語中的cl?sc，意為“緊密的”或“密切的”。它的形式變化包括形容詞形式closely，副詞形式closely，以及動詞形式close。

變化形式：

形容詞形式closely可以作為副詞使用，表示“緊密地”或“密切地”，例如“The two countries are closely related.”（這兩個國家關系密切。）

副詞形式closely可以修飾動詞或形容詞，表示“深入地”或“仔細地”，例如“He closely examined the evidence.”（他仔細檢查了證據。）

動詞形式close可以表示“關閉”或“結束”，例如“The meeting was closed to the public.”（會議閉門進行。）

相關單詞：

closely相關的單詞有clue（線索），cloth（布料），cliff（懸崖），cloud（云），climate（氣候）等。這些單詞都與“緊密的”或“密切的”有關，體現了closely這個詞的廣泛用途。

另外，closely還可以與介詞搭配使用，如“on”、“to”、“with”等，表示不同的意思。例如，“close to”可以表示“接近”，而“close on”則表示“緊接著”。

總的來說，closely這個詞在英語中具有廣泛的應用，其詞源、形式變化和相關單詞都體現了其豐富的含義和用法。

常用短語：

1. closely related

2. closely examine

3. closely watched

4. closely follow

5. closely packed

6. closely connected

7. closely guarded

例句：

1. The two countries are closely related in history and culture.

2. We closely examined the evidence to ensure its authenticity.

3. The stock market was closely watched by investors.

4. Please closely follow your teacher"s instructions in class.

5. The two sides are closely packed with potential conflicts.

6. The two companies are closely connected in business dealings.

7. The city"s security is closely guarded to prevent terrorist attacks.

英文小作文：

Title: Close Relationships and Importance of Security

Close relationships are essential in our lives, whether it"s family, friends, or even work colleagues. These relationships provide us with support, understanding, and companionship, which are vital for our mental and physical well-being. On the other hand, security is also crucial, as it protects us from harm and uncertainty. However, maintaining close relationships and ensuring security are not mutually exclusive; in fact, they go hand in hand.

Close relationships can help us feel safer and more secure, as we can rely on the support and understanding of those we trust. Conversely, having strong relationships can also help us build resilience and cope better with challenges and threats. Furthermore, close relationships can help us maintain a positive outlook on life, which can contribute to our overall sense of security.

On the other hand, ensuring security is also essential for maintaining close relationships. If we are constantly worried about our safety or that of those we care about, it can have a negative impact on our relationships and make them more fragile. Therefore, it is important to take appropriate measures to ensure our personal and social security, while also investing in close relationships and fostering trust and understanding among ourselves.

In conclusion, close relationships and security are two aspects of our lives that are intertwined and cannot be separated. By investing in both, we can create stronger bonds and a more secure future for ourselves and those we care about.