The bow-wow theory: In primitive times people imitated the sounds of the animal calls in the wild environment they lived and speech developed from that.
“汪汪”理论：原始时代，人们在野外模仿动物发出的叫声，语言便产生了。
The content in the Dendrobium candidum growing under the wild environment is less than that in the manual cultivation Dendrobium candidum.
野生环境下生长的铁皮石斛比人工栽培的铁皮石斛略逊一筹。
The content in the Dendrobium candidum growing under the wild environment is less than that in the manual cultivation Dendrobium candidum.
野生环境下生长的铁皮石斛比人工栽培的铁皮石斛略逊一筹。
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