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abbr. 上下文无关文法；控制流图control flow graph
🗣️ 情景例句
if he spends less on the cultural programs.
假如他在这文化活动上减少开支的话。
Seeing is believing.
百闻不如一见。
Oh. It's very nice. How far have you been in it?
嗬，太漂亮了。你开它走了多远？