At that time, not only the boundary of then music origin was fixed but also the three concepts "voice, sound and music" were distinguished, via the analysis of music essence.
彼时不仅对音乐的起源作出了多种界说，还在对音乐本质的分析中，将“声”、“音”、“乐”这三个概念加以区分。
Eventostratigraphic boundary and biostratigraphic boundary have to be clearly distinguished in the study of the Permian-Triassic boundary in South China.
华南二叠-三叠系界线研究应严格区分事件地层界线与生物地层界线。
Abstract:Basedon the criterion of boundary between Shang and Western Zhou dynasty in Anyang region, a pile of Western Zhou remains are distinguished.
摘要：本文在提出安阳地区商周分界判断标准的基础上，新辨识出一批重要的西周遗存。
With this uncertainty, a semantic category fails to have its boundary clearly distinguished from another, and as a result, its meaning cannot be precisely defined.
这种不确定性使得语义范畴之间没有清晰的分界，从而使语义得不到明确的规定。
With this uncertainty, a semantic category fails to have its boundary clearly distinguished from another, and as a result, its meaning cannot be precisely defined.
这种不确定性使得语义范畴之间没有清晰的分界，从而使语义得不到明确的规定。
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