教年轻人怎样打七叶树果游戏，怎样建洞穴，怎样生火，怎样露营的书籍都成了畅销书。
Books teaching young people how to play conkers, build dens and fires, and set up camp are bestsellers.
通过典型抽样调查，查明甘肃林区主要建群树种橡树的籽壳碗叶的产量；
Through the typical sample survey, I have ascertained the output of bow leaf of oak tree seed.
采叶是当今银杏建园的主要经营目的之一。
Leaf collection is currently one of the major aims of ginkgo gardens.
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