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abbr. 上下文无关文法；控制流图control flow graph
🗣️ 情景例句
Did you hear the news?
你听说那条新闻了吗？
I won the most valuable prize!
我赢得了最高的奖赏！
First it made a circle to the right, then to the left.
令他吃惊的是，蜜蜂开始在蜂窝的表面表演一种舞蹈。