Preterm delivery without spontaneous labour 早产不伴有自然临产
Preterm spontaneous labour with term delivery 提前自然临产伴有足月产
Preterm spontaneous labour with preterm delivery 提前自然临产伴有早产
·2,447,543篇论文数据，部分数据来源于NoteExpress
In the forests of America, Norway, Germany, the Pyrenees and Alps, this sort of Labour is largely employed on trees of spontaneous growth.
在美国、挪威、德国、比利牛斯山和阿尔卑斯山的森林中，伐木工人砍伐的主要是自然生长的树木。
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