Put it this way: From a public health perspective, we don't know who'll get into a car accident, but we tell everyone to wear their seat belts.
可以这样说：从公共健康的角度来说，即使我们不能预测谁会遇到车祸，但是我们会告诉每一个人必须佩戴安全带。
Of course it is difficult to get accurate data but, to put the issue into perspective, I have found that, in a year of working in Eastern Europe, I discover fresh zoos on almost a weekly basis.
当然获得准确的数据是很困难的，但是带着这个问题去观察，我发现在一年的西欧工作中，基本上我一个星期就会发现一家新的动物园。
Of course it is difficult to get accurate data but, to put the issue into perspective, I have found that, in a year of working in Eastern Europe, I discover fresh zoos on almost a weekly basis.
当然获得准确的数据是很困难的，但是带着这个问题去观察，我发现在一年的西欧工作中，基本上我一个星期就会发现一家新的动物园。
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