If you don't know where you're going, and they don't know where they're going, we have a classic case of the blind leading the blind; both of you will end-up in a ditch.
如果你不知道你的人生方向在哪儿，他也不知道他的人生方向在哪儿，那么这就是问道于盲的经典案例，你们会一同陷入沟壑。
But in the wake of the news about flossing, when it comes to oral hygiene, how much does your average person know about what we should be doing - and which habits do we need to ditch?
但是在有关牙线洁牙无用的报道出来后，人们开始关注口腔卫生问题，但究竟哪些是我们应该做的，又有哪些习惯是我们应该摒弃的？
But in the wake of the news about flossing, when it comes to oral hygiene, how much does your average person know about what we should be doing - and which habits do we need to ditch?
但是在有关牙线洁牙无用的报道出来后，人们开始关注口腔卫生问题，但究竟哪些是我们应该做的，又有哪些习惯是我们应该摒弃的？
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