短语
中文翻译：Unknown
同义词：
['take action', 'act promptly', 'get to work', 'take immediate action']
例句：
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1. We need to be on it and finish the project by tomorrow.
我们需要立刻行动起来，明天之前完成这个项目。
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2. The boss is always on it when there's an emergency.
老板总是一有紧急情况就立刻行动。
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3. She was on it and got everything ready for the party.
她立刻行动起来，为聚会做好了一切准备。