From little flurries to full-scale
blizzards, it's not unusual for snow to fall come winter.
During the cold weather months, some folks
like to share recipes for how to make snow ice cream and other treats that use
fresh powder as a base, adding milk, sugar, and toppings.
在寒冷的日子里，有些人喜欢分享用雪做冰淇淋和其他甜点的食谱，在新鲜的雪中加入牛奶、糖，撒上浇头。
Obviously, no one is recommending anyone
scoop up a bowlful of snow idling on the side of the road, full of salt, muck,
and other unpleasantness.
显然，没有人会建议你从马路边舀一碗雪来做美食，那里的雪掺杂着盐粒和淤泥，还有其他恶心的东西。
But it does beg the question: Is any snow
actually safe to consume? According to meteorologist Mary Scarzello Fairbanks,
snow isn't all that pristine.
但是这也引发了一个问题：有没有可以安心食用的雪？气象学家玛丽·斯卡泽罗·费尔班克斯表示，雪并没有那么干净。
When it falls, it will also collect things
hanging in the air, including dirt, soot, and even bacterial particles.
Depending on the region, snow could also contain sulfates, nitrates,
formaldehyde, mercury, or pesticides.
当雪花落下时，还会吸收空气中的悬浮物，包括灰尘、煤烟甚至细菌。有些地区的雪可能还会含有硫化物、硝酸盐、甲醛、水银或杀虫剂。
If it's windy, snow could even mix with
dirt kicked up from the soil before settling. At the same time, there doesn't
seem to be a surge of reports of illnesses related to snow consumption.
如果风大的话，雪花甚至会与从泥地上扬起的尘土混合在一起。与此同时，关于吃雪引发的疾病似乎没有太多报道。
Assuming you don't consume a huge quantity
of it, it's unlikely that whatever contaminants might be in the snow will be
present in large enough amounts to cause problems.
只要你不吃太多雪，雪中可能包含的任何污染物都不足以致病。
While no one is technically advocating for
snow ingestion here, just a small bite will probably be fine.
严格意义上，我们并不建议你吃雪，但是吃一小口应该也无妨。
苏格拉底有一句名言：
我知我无知
。说的是，当你认识到的东西越多就越发现自己无知。苏格拉底认为，人对于客观世界的认识是有限的，且不可能完全认识客观世界，并且不应对客观世界刨根究底。神对于世界的规划自有安排，若人一意孤行地探索世界和自然的奥秘，则最终将亵渎甚至触怒神明。正因为人对神所构建的世界不可能实现完全认知，因此那些宣称自己能够认识和改造世界的人，本身便是无知的代言。尽管苏格拉底的关于“ 我知我无知”的观念的解读，在现在看来有失客观科学。但至少苏格拉底告诫人们，人的认知是有限的，现有的知识甚至可能存在错误和疏漏。因此，无论任何时代，我们都必须对自己的无知加以认识并通过不懈的开拓，去更新甚至颠覆固有的知识结构。我们在求学之路上也要报以我知我不知的心态，才能走得更远、终有所成。最后，祝愿每一位考研学子都能顺利上岸！
