Protocol buffers supports optional, required and repeated fields. An example of an address book message definition using protocol buffers would look like this.
Protocolbuffers支持可选的，必需的和重复的字段。
In many fields of medical studies, the analysis and design of repeated measurements data are often come across.
在医学研究的各个领域常会遇到重复测量资料的数据分析与设计的问题。
The linear mixed effects model in the data analysis and design of repeated measurements has been found an wide utilization in medical fields.
线性混合效应模型在医学重复测量资料的数据分析与设计中广泛应用。
The linear mixed effects model in the data analysis and design of repeated measurements has been found an wide utilization in medical fields.
线性混合效应模型在医学重复测量资料的数据分析与设计中广泛应用。
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