当徐大约六岁时，他开始写一些短篇故事。
When Xu was about six years old, he began to write some short stories.
芝加哥西北大学的博士费利斯·徐说：“当人们睡眠不足时，他们体内的应激激素水平会升高，这会降低免疫功能。”
"When people are sleep-deprived, there are higher levels of stress hormones in their bodies, which can decrease immune function," says Dr. Phyllis Zee of Northwestern University in Chicago.
当荷载被移走时，应变的弹性部分恢复，但塑性应变部分(滑移和徐变)却会永久呆留。
When the load is removed, the elastic portion of the strain is recovered, but the plastic part (slip and creep) remains as permanent set.
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