高级警司余达松称，这名23岁的嫌疑人作案意图不清。

Police senior superintendant Yu Tat-chung said the 23-year-old suspect's motives were not clear.

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时至今日，泰山迎客松已有500余岁左右的树龄。

Today, Taishan ying ke pine has more than 500 years of age.

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推导出了成叠带状光纤在松套管中余长的两个计算公式，此两公式是带状光纤缆结构设计需要用到的基本公式。

We have derived two formulas calculating excess lengths for folded ribbon fiber in loose tube. These formulas are useful for structural design of ribbon fiber cable.

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