一只快乐的小鸟在一棵落叶松上歌唱，仅此而已。
A merry little bird was singing on a larch-tree, but nothing more.
落叶松是我国北方主要造林树种之一。
The larch is one of major tree species for afforestation in north china.
这棵松树是落叶松。
本文主要研究了落叶松指接材的主要力学性质。
The important mechanical properties of Larch with finger joint were studied in this research.
结果表明：不同药剂处理对华北落叶松幼苗生长有不同的作用。
The results showed that the different medicaments were of the different action.
结果表明：不同药剂处理对华北落叶松幼苗生长有不同的作用。
The results showed that the different medicaments were of the different action.
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