那就是他和博士生安娜斯塔西娅·察柯柳金娜打算回答的问题。

That question is what he and Ph.D. student Anastasia Zakolyukina set out to answer.

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那一刻，我知道母亲真的有些疲惫了，就像她用了一生的柳篮，历经千万次的修复以后，总有一天会停止下来，成为往事。

At that moment, I realized mother was really tired, like the wicker basket which had been used all through her life.

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我国北方农村的建筑用材，多以杨、柳、榆等速生树种为主，但这些木材易发生腐朽与虫蛀。

Most structural timber species now used in the North China's rural areas are poplar, willow, elm etc, which are fast growing trees but whose woods are very susceptible to biological deterioration.

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