<cn>
#### 预加载的卡片
数据读入前会有文本块样式
</cn>
<us>
#### Loading card
Shows a loading indirector while the contents of the card is being featched
</us>
```html
<template>
<a-card loading title="Card title" style="width: 34%;">
whatever content
</a-card>
</template>
```