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        "quote": "一个函数 $L : T M \\to \\mathbb { R }$ 称为 <u class=\"concept-term\" data-concept-identity=\"urn:uuid:1b151f83-697f-43f4-b6a1-aa3dfd976f64\" data-concept-route=\"/concept-identities#concept-1b151f83-697f-43f4-b6a1-aa3dfd976f64\" id=\"first-8d838ffb5d6b1f86836a-zh\">拉格朗日函数(Lagrangian function)</u>，并且对于任意参数曲线 $\\gamma : [ t _ { 0 } , t _ { 1 } ] \\to M$，我们定义相应的 <u class=\"concept-term\" data-concept-identity=\"urn:uuid:ff25d777-490f-4ae6-b7f9-2071832df195\" data-concept-route=\"/concept-identities#concept-ff25d777-490f-4ae6-b7f9-2071832df195\" id=\"first-bee57b2516883280ed58-zh\">作用量(action)</u> 为",
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        "quote": "A function $L : T M \\to \\mathbb { R }$ is called a <u class=\"concept-term\" data-concept-identity=\"urn:uuid:1b151f83-697f-43f4-b6a1-aa3dfd976f64\" data-concept-route=\"/concept-identities#concept-1b151f83-697f-43f4-b6a1-aa3dfd976f64\" id=\"first-8d838ffb5d6b1f86836a-en\">Lagrangian function</u>, and for any parametrized curve $\\gamma : [ t _ { 0 } , t _ { 1 } ] \\to M$ we define the corresponding <u class=\"concept-term\" data-concept-identity=\"urn:uuid:ff25d777-490f-4ae6-b7f9-2071832df195\" data-concept-route=\"/concept-identities#concept-ff25d777-490f-4ae6-b7f9-2071832df195\" id=\"first-bee57b2516883280ed58-en\">action</u> to be",
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