其深层原因与民族的社会心理相关，主要有：冷漠麻木心态，敌意猜疑心态，压抑阴郁心态以及口欲期固结等。
The causes in depth have something to do with the social psychology of our nation, mainly including indifferent, suspicious depressing state of mind and so on.
骑行者就能避开交通高峰期，随心所欲的到处移动。
Cyclists are kept out of street traffic and can safely go anywhere they need to.
在这一时期，他们对自己和老师寄予美好的期盼，表现出更强烈的求知欲和参与人际交往互动的愿望。
During this period, they show a strong thirst for knowledge and participation of interpersonal interaction aspirations, so they expect more from their teachers.
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