To make Bootstrap cards appear horizontally, you can use the d-flex class on a parent element and the flex-row class on the card container. Here's an example of how you can create two horizontal cards:

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<div class="d-flex">
  <div class="card flex-row">
    <img class="card-img-left" src="image1.jpg" alt="Card image cap">
    <div class="card-body">
      <h5 class="card-title">Card 1</h5>
      <p class="card-text">This is some sample text within a card body.</p>
    </div>
  </div>
  <div class="card flex-row">
    <img class="card-img-left" src="image2.jpg" alt="Card image cap">
    <div class="card-body">
      <h5 class="card-title">Card 2</h5>
      <p class="card-text">This is some sample text within a card body.</p>
    </div>
  </div>
</div>

In this example, the two cards are contained within a d-flex class, which specifies that its child elements should be displayed as a flex container. The flex-row class on each card specifies that they should be displayed as a flex item within their parent container and aligned horizontally.

To change from d-flex to a different style, you simply need to replace d-flex with the name of the desired CSS display property. For example, if you want to switch to display: block, you would replace d-flex with block.

Here is some example code in CSS which replaces d-flex with display: block:

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/* Change from d-flex to display block */
.element {
  display: block;
}

Note that the correct display property will depend on the layout you want to achieve, and that there are many properties available besides d-flex and block. You can find a list of CSS display properties and their usage here: https://www.w3schools.com/cssref/pr_class_display.asp

float-left is a CSS property that is used to align elements to the left or right. It can be used to float elements around a page in a specific order.

d-flex is a class from the Bootstrap framework. It is used to create flexible and responsive layouts using a set of flexbox-based utility classes.

In React, it is recommended to use modern CSS approaches like d-flex instead of float. This is because modern CSS layouts are more dynamic and easier to maintain. So, you should use the d-flex class instead of float-left to make the layout more flexible and responsive.

Example:

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<div className="d-flex weather-temperature">
 // content here
</div>

Note: Make sure to import the Bootstrap framework in your React application. You can use a CDN link or install Bootstrap using npm or yarn. Here's the link to the Bootstrap documentation for more information: https://getbootstrap.com/docs/5.0/getting-started/introduction/

You can use the Bootstrap card-deck class to make your cards the same height.

You can also use d-flex and align-items-stretch to make the cards the same height using Flexbox.

Here's an example using the card-deck class:

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<div class="card-deck"> 
  <div class="card"> 
    <h3>Card 1</h3> 
  </div> 
  <div class="card"> 
    <h3>Card 2</h3> 
  </div> 
  <div class="card"> 
    <h3>Card 3</h3> 
  </div> 
  <div class="card"> 
    <h3>Card 4</h3> 
  </div>
</div>

Here's an example using Flexbox:

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.card-deck {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
}

.card {
  flex: 1 0 auto;
}