Filled with tranquil and blue atmosphere, the Back Sea was not so noisy and busy as now, and who went there were mostly Beijing people.

那时候的后海有一些安静和忧郁的气质，没有这些喧闹，游人也很少，基本上都是北京人在周围活动。

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Moreover, photodetectors based on quantum dots produce less noisy images, so the picture is sharper even if the number of pixels is not increased.

而且， 基于量子点的光电探测器产生的图像噪点更少， 因此即便像素没有提高， 产生的图像也会比以前锐利。

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She is subject to frequent bad headaches, too, so we must really try not to be noisy.

她还不时会头疼，所以我们最好不要太吵。

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