To make life easier (and it is good practice anyway), we make sure that all data is reachable from the root of a single tree of data structures in memory.
为了让生活更容易（它总是一个很好的实践），我们必须确保所有的数据从单一数据结构书的根上是可获得的。
It is a melodious song, the wine is acquainted with cups, along the south wild goose is the root of the old friend, is willing with peace and happiness, the cane with your life.
相逢是首悠扬的歌，相识是杯醇香的酒，相处是那南飞的雁，相知是根古老的藤，愿幸福与平安伴随着您一生。
But the course of my life, when I look back, is as orderless as a trickle of water that is diverted and guided by every pebble and crevice and grass-root it encounters.
但当我回首时，我发现生命的过程就像一股不定的水流，遇到的每一块卵石、每一道罅隙、每一处草根都能改变它的方向。
But the course of my life, when I look back, is as order less as a trickle of water that is diverted and guided by every pebble and crevice and grass-root it encounters.
但是，回首来时路，我的生命历程却似一股涓涓细流一般毫无规律：她所遇到的每一块鹅卵石、每一处岩石罅隙、每一棵草根都可以让它偏转、导引它的方向。
But the course of my life, when I look back, is as order less as a trickle of water that is diverted and guided by every pebble and crevice and grass-root it encounters.
但是，回首来时路，我的生命历程却似一股涓涓细流一般毫无规律：她所遇到的每一块鹅卵石、每一处岩石罅隙、每一棵草根都可以让它偏转、导引它的方向。
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