自（拼音：zì）是汉语通用规范一级汉字（常用字）。此字初文始见于商代甲骨文和商代金文，其古字形像人的鼻子，后假借作第一人称代词，指自己。自又有开始的意思，又由此虚化为介词，表示由、从等。 （基本信息主要来源： ）
网络释义专业释义
... 35）round围着...，绕过...，在...周围。 36）since自...以后，自...以来。 37）through经过...，穿过...。（立体层面） ...
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... LITTLE THINGS 小东西 SELFISHNESS 自 私 THE MONKEY, AND WHAT HE DID 猴子和它做的事情 ...
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短语
自我 self ; self; I; Ich; ego ; self; I ; [心理] ego
自然哲学 [社科] natural philosophy ; Philosophy of Nature; Natural Philosophy ; philosophy of nature ; Philosophy of Nature; Natural Philosophy ; Zweiter Teil der Enzyklopädie der philosophischen Wissenschaften: Natur Philosophie
自由 liberty ; Freedom ; freedom; liberty
自力更生 self-reliance ; be self-reliant ; pursue an independent path of development ; self-sufficiency; self-reliance
四个自信 “four matters of confidence” ; Matters of Confidence; the confidence in the path; theory; system and culture of socialism with Chinese characteristics ; matters of confidence ; “Four matters of confidence”
自然科学 natural science(s) ; Physical Sciences ; Science
自治区 autonomous regions ; autonomous region ; [社科] autonomous region ; municipality
理论自信 confidence in the guiding theories ; confidence in the theory (of socialism with Chinese characteristics) ; confidence in the theory
自然人 [法] natural person ; natural person ; Natural ; national person
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natural language - 引用次数：13
Since1997,a series of evaluation on this research have been conducted,and made it more and more popu lar in Natural Language Processing,especially in information retrieval. The res earch on topic detection and tracking in China is just starting.
自1997年以来连续举行的多次大规模评测使得话题识别与跟踪研究正逐步成为近来自然语言处理尤其是信息检索领域的一个研究热点，目前国内在这方面的研究尚处在起步阶段。
参考来源 - 期刊学术社区 -
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双语例句原声例句
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全球77%的能量产生自化石燃料。
On a global scale, 77% of energy is created from fossil fuels.
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旅客自机场改乘出租汽车到旅馆。
Passengers are transferred from the airport to the hotel by taxi.
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这盘磁带将在30秒后自毁。
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I sometimes compare myself with the mad old slum women I hear denouncing and remembering; "how dare you?"
我有时自比贫民窟的疯老女人,我听到指责不断提及，你怎敢“
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So by parallel we mean - they're either both spin up remember that's our spin quantum number, that fourth quantum number.
所以我们意味着,它们都是自旋向上,记住我们的自旋量子数，是第四个量子数。
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And some of them might be spinning clockwise, in which case, according to the right-hand rule we would consider them spin-down.
而另一些电子则是在顺时针自旋，在这种情况下，根据右手定理,我们会以为它是在向下转。
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