Below the glass strain temperature, interdiffusion coefficients are almost independence of sodium oxide concentration in the glasses and somewhat increase with long ion exchange time.

低于玻璃应变温度，互扩散系数几乎不依赖玻璃中的氧化钠浓度，而略随离子交换时间增加而增大。

youdao

Around me, these teenager had draw on glasses, it is so terrible problem for us, I think make us shortsighted the main cause as below.

在我的周围，那些才十岁的小孩就已经配戴上了眼镜，想想这是一个多么可怕的问题！我想造成青少年近视的问题主要有以下几方面。

youdao

The stream showed clear and smooth-looking in the glasses and, below the curl of falling water, the spray from the dam was blowing in the wind.

小河在望远镜里显得清澈而平静，打着漩涡的水从拦水坝泻下来，底下的水花在风中飞溅。

youdao

The stream showed clear and smooth-looking in the glasses and, below the curl of the falling water, the spray from the dam was blowing in the wind.

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