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A test facility has been constructed for the fall-down test of high-temperature sphere into the water.
建造了高温炉下落小球实验装置，并进行了高温小球落入水中的实验。
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This made her fall down in her seat by my son, "How come your test scores came down?"
妻子立刻在儿子身边坐了下来：“成绩怎么退步了？”
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