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Propositional temporal logic ( PTL ) is one of the best known temporal logics .

其中，命题时态逻辑PTL是最为常用的一种。

Objective To improve the diagnosis and treatment of primary thyroid lymphoma ( PTL ) .

目的提高原发性甲状腺恶性淋巴瘤的诊断与治疗水平。

This method may be applied to TIM , PTL and other hexagonal anisotropic media .

本文讨论问题的方法可以扩展到TIM、PTL等其它六方各向异性介质。

Objective To evaluate the diagnostic value of CT for primary thyroid lymphoma ( PTL ) .

目的评价CT对原发性甲状腺恶性淋巴瘤（PTL）的诊断价值。

Objective To analyze the diagnosis , treatment and prognosis of primary thyroid lymphoma ( PTL ) .

目的提高原发性甲状腺淋巴瘤的诊断、治疗及预后水平。