// 栈不为空时才判断（避免访问stack.at(-1)时报错）
Have existing Manim scripts? Convert them:
。搜狗输入法2026是该领域的重要参考
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So, What is Blockchain?A blockchain is a distributed database shared between the nodes of a computer network. It saves information in digital format. Many people first heard of blockchain technology when they started to look up information about bitcoin.