采用以上两种方法结合使用，可降低三倍体山杨的育苗成本。
It can reduce the cost of seedling cultivation by above methods.
在火柴点着之后，它就立即烧光了，但是产生的热量足以点燃山杨做的火柴棍。
It burns itself out instantly after the match is lit but generates enough heat to ignite the aspen shank.
于是我注意到在我邻近的小屋傍边的山杨叶片上的积雪。
Then I noticed these aspens leaves and snow at my neighbor's cabin.
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