前不久，我来到北京参加一个事关我研究领域的重要会议。
Not long ago, I came to Beijing to attend an important conference in my field.
2006年，我来到北京，打算见识一下著名的清华大学。
In 2006, I was in Beijing and decided to visit the famous university of Tsinghua.
我来到北京已有七年之久。在此之前，我只吃过咸味的粽子。
Until I arrived in Beijing about seven years ago, I only tasted savory dumplings.
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