这种器具几乎是隐形的而且非常舒服，会逐渐让你的牙齿得到矫正，让你也可以展现完美的笑容。
They are almost invisible, extremely comfortable, and will gradually straighten your teeth into the perfect smile.
然而，只有和戴丽亚在一起时我才能够以这种方式交流，这可能是因为和她在一起时，我感觉非常舒服吧！
And it was only with Dahlia that I was able to communicate this way, probably because I felt so comfortable with her.
在这种情况下，你感觉就像是漂了起来，对飞行员和乘客来说都非常不舒服。
It can induce a feeling of floating and that's very uncomfortable for passengers, and pilots as well.
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