动词短语
中文翻译：进入
同义词：
['work', 'study', 'engage in', 'get into', 'immerse oneself in']
例句：
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1. She grinds in at the office every morning.
她每天早上都准时到办公室。
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2. He has been grinding in for hours now.
他已经连续工作了好几个小时了。
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3. We need to grind in and make sure everything is in order before we start our presentation.
在我们开始演讲之前，我们需要确保一切都井然有序。