buoyancy的音標為[?bu??si?ns]，基本翻譯是“浮力；輕快；興高采烈”。速記技巧可以是：boo-sy-ness。

Buoyancy這個詞源自拉丁語“buus”，意為“輕的，浮的”。它的變化形式包括名詞形式“buoyancy”和形容詞形式“buoyant”。

相關單詞：

Float（漂浮）：這個詞直接源自buoyancy，表示物體在液體中漂浮的狀態。例如，一個浮標就是一個漂浮在水面上的物體。

Airy（輕盈的）：這個詞表示空氣的，輕的，常用來形容物體輕盈或空氣流動的狀態。

Light（輕的）：這個詞是最直接的詞源，直接來自拉丁語“lucidus”，表示輕的或明亮的。

Levity（輕率）：這個詞表示輕浮，不嚴肅，常用來形容人的行為或態度。

Buoy（浮標）：這是一個常用的英語單詞，表示漂浮在水面上的物體，通常用于引導航行或測量水深。

Buoyant（浮動的）：這個詞表示可以漂浮的，常用來形容物體或經濟狀況。

Floatation（漂?。哼@是一個名詞，表示物體的漂浮過程。

Afloat（漂?。哼@是一個副詞，表示物體在液體中漂浮的狀態。

Upward（向上的）：這個詞常用來形容上升或浮起的狀態，有時也用來形容經濟狀況向好。

以上這些單詞都與buoyancy這個概念有直接或間接的聯系，描述了物體在液體中漂浮、輕盈、輕率、浮標、浮動、漂浮、向上等狀態和情況。

常用短語：

1. Buoyant air

2. Buoyancy force

3. Floatation device

4. Buoyancy control

5. Water buoyancy

6. Buoyant effect

7. Buoyancy pump

例句：

1. The balloon is buoyant in the air and floats upwards.

2. The ship is experiencing heavy water buoyancy and needs to be repaired.

3. The diver must control his buoyancy to avoid being trapped underwater.

4. The book is a good introduction to the science of buoyancy and fluid dynamics.

5. The airship is a highly efficient buoyancy device that can travel long distances.

6. Buoyancy pumps are commonly used in deep-sea exploration to provide oxygen and other essentials to submerged equipment.

7. The ocean"s natural buoyancy keeps the Earth"s oceans at a constant level.

英文小作文：

Buoyancy is a fundamental concept in physics that refers to the upward force exerted by a fluid on an object that is immersed in it. It is a crucial aspect of water and air dynamics, and plays a significant role in various fields such as engineering, marine science, and aeronautics.

When an object is submerged in a fluid, it experiences a force that opposes its downward motion and tries to raise it upwards. This force, known as buoyancy, is proportional to the density difference between the fluid and the object, and is dependent on the shape, size, and density of the object.

In engineering applications, buoyancy plays a vital role in the design of structures such as bridges and dams, as it can affect their stability and load-bearing capacity. In marine science, buoyancy is crucial for the survival of marine organisms such as fish and whales, as it determines their buoyant behavior and swimming efficiency. In aeronautics, buoyancy is used to control the altitude and speed of aircraft, and to maintain their stability in turbulent air currents.

From a practical perspective, understanding buoyancy is essential for navigating bodies of water and designing effective flotation devices. It also provides valuable insights into the behavior of fluids and the interaction between objects and their environment. As such, buoyancy is an integral part of our daily lives, shaping our experiences and influencing our actions in numerous ways.