This theme comes back in the scene where his grandmother is washing him.
祖母给他洗澡时，这一主题再次出现。
I can always find a washing all, or the opportunity to come back.
我总是在寻找一个可以洗涤一切，或者可以重新再来的机会。
It is his back toward the sky, still blue, such as washing.
它仰面向着天空，依然如洗的湛蓝。
Device Features: small occupation, short backwash time, less water amount for back-washing, etc.
装置特点：占地面积小、反冲洗时间短、反洗水量少等。
Device Features: small occupation, short backwash time, less water amount for back-washing, etc.
装置特点：占地面积小、反冲洗时间短、反洗水量少等。
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