有些习惯是受到烟碱或者酒精上瘾等外力的影响所养成的。
Some habits are aided by outside forces such as nicotine or alcohol addiction.
他对化学的知识也仅限于有关不同海拔下烤面包的时间或者酒精的蒸发比率。
He understood chemistry only insofar as it related to the baking time of bread at various elevations or the evaporation rate of alcohol.
社会及环境因素，像来自同辈的压力或者酒精很容易获得，起了主要的作用。
Social and environmental factors such as peer pressure and the easy availability of alcohol can play key roles.
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