concave的音標是[k?n?ke?v]，基本翻譯是凹的，深的。速記技巧可以使用詞根記憶法，其中con-表示“共同”，-cave表示“凹陷”，所以concave就是“共同凹陷”的意思。這個詞根可以用于記憶其他類似的單詞，如convex（凸起的）、reconcile（調解）等。通過詞根記憶法，可以更快速地記住單詞的含義，并有助于提高詞匯量。

Concave的詞源：

Concave這個詞源自拉丁語concavitas，意為“凹形的”。其詞根cavus意為“凹陷的”或“洞”。

變化形式：

Concave有形容詞和名詞兩種形式，其形容詞形式為concave，名詞形式為concavity。

相關單詞：

1. concavity：凹陷，凹痕；凹處，凹面。例如，earthenware bowl has a concavity on its bottom（陶器碗的底部有一個凹面）。

2. concave lens：凹透鏡。凹透鏡通常用于矯正視力或用于光學儀器。

3. concavity-shaped：具有凹形形狀的。這個詞常用于描述具有特定形狀的物體或結構。

4. concavely：凹地地。表示某種行為或狀態具有凹形或凹陷的特點。

5. concavities：凹面。可以指物體表面的所有凹陷或凹痕。

6. concave mirror：凹面鏡。凹面鏡是一種常見的光學儀器，用于反射光線。

7. concavely-shaped：具有凹形形狀的。這個詞常用于描述具有特定形狀的物體或結構，如碗、杯等。

8. concavity-cut：切割成凹形。表示某種切割方法或工藝，使物體具有凹形形狀。

9. concave surface：凹面表面。可以指物體表面的所有凹陷或凹痕，也可以指光學儀器中的反射面。

10. concavity tool：凹形工具。可以用于制造或切割具有凹形形狀的物體或表面。

以上這些單詞都與Concave這個詞有著密切的聯系，它們描述了各種與凹形相關的概念和現象。

常用短語：

1. concave lens

2. concave mirror

3. concavity

4. concave surface

5. in the concave

6. convex and concave

7. concave lens and mirror

例句：

1. The lens of my glasses is concave, which helps me see better.

2. The moon is a concave mirror, reflecting the light of the sun.

3. The surface of the bowl is concave, making it easy to grip.

4. The sculpture is carved in a concavity, creating a unique design.

5. The two mountains are convex and concave, forming a beautiful landscape.

6. The two objects are in the concave of each other, making a perfect fit.

7. The shape of the room is a combination of convex and concave, creating a unique atmosphere.

英文小作文：

Title: The Beauty of Concave and Convex

In nature, we see many examples of concave and convex shapes, which create unique and beautiful landscapes, sculptures, and optical devices. The moon, a concave mirror, reflects the light of the sun to create a magical effect, while the bowl, a concave surface, makes it easy to grip and hold. These shapes are not only functional but also visually appealing.

The combination of convex and concave shapes creates a dynamic atmosphere in the room where I am writing this essay. The light from the lamp shines through the window, casting a shadow on the wall, which is formed by the combination of the convex shape of the window frame and the concave shape of the window sill. This creates a beautiful contrast that adds to the ambiance of my workspace.

In art and design, concave and convex shapes are often used to create unique and interesting designs. A sculpture carved in a concavity forms a unique design that catches the eye, while a bowl with a gently curved surface creates a harmonious balance between straight and curved lines. These shapes add depth and dimension to any setting, making it more interesting and visually appealing.

In conclusion, the beauty of concave and convex shapes is undeniable. They create unique and interesting designs, add depth and dimension to any setting, and enhance the ambiance of our surroundings. I hope you enjoyed this essay and found it inspiring!