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。
This seemingly irrational line has been repeated in every possible permutation, on every possible occasion, e.g. "What big brother is reading not a book, but loneliness."
这句看上去很无厘头的话被用在了所有场合下的所有可能搭配的排列中，比如，“哥看的不是书，是寂寞。”
Based on the philosophy of "the Book of Changes", the theory of traditional Chinese medicine (TCM) was formed through peoples struggle against the diseases and repeated clinical practice.
前言：中医学是在《易经》的哲学基础上，通过人民对疾病斗争的反复实践总结升华为理论而形成的。
Especially in the repeated reading some book Chuang Tzu, the combination of our own job, sentiment that is synergistic to the painting inspiration, and hope to share with colleagues.
本文通过笔者反复研读一些庄子的著作，并结合自身的工作及感悟所得，望能与同仁共勉。
There is, therefore (to say nothing of more important things) a minor proposition or two, casually laid down and unrelated to the main purpose of the book, which he probably would not have repeated.
因此(更不必说更重要的东西)，有一两个偶然落下并无关书的主要目标的次要的命题，他可能会不重做。
As most words would be repeated again and again in the book, such a reading habit helps students to establish long time memory.
久而久之，由于多数生词会在原著中反复出现，阅读原著习惯的形成也自然而然地解决了词汇问题。
Li Guang, a tragic hero in The Book of History, was valiant, kindhearted and honest, but not lucky enough to be put in an important position though he had made repeated battle achievements.
李广是《史记》中的悲剧英雄，他勇武、仁爱、淳厚，屡立战功却不得重用，最后被迫自刎。
Li Guang, a tragic hero in The Book of History, was valiant, kindhearted and honest, but not lucky enough to be put in an important position though he had made repeated battle achievements.
李广是《史记》中的悲剧英雄，他勇武、仁爱、淳厚，屡立战功却不得重用，最后被迫自刎。
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