There are lots of stellar pairs in the universe, but all are interacting and exchanging matter with one another because they are so close together.
宇宙中存在许多双星系统，但是由于彼此间离得太近，它们全部都会发生交互并进行物质交换。
Architects will place buildings close enough together so they can cast shade on their neighbors and ensure normal cars won't be driving through the streets.
建筑师将建筑间距设计得足够近，这样可以使建筑互相提供荫庇，同时也确保普通汽车不会在街上行驶。
Spruce trees typically grow close together and in so doing they must grow very tall and fast in order to obtain necessary sunlight.
云杉树通常生长并拢，在这样做，他们必须长得非常高大，速度快，以获得必要的阳光。
The pine trees were so tall and grew so close together, that they shut out the light.
松树很高，挨得紧紧的，把光都挡住了。
The pine trees were so tall and grew so close together, that they shut out the light.
松树很高，挨得紧紧的，把光都挡住了。
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