音標(biāo)發(fā)音英式音標(biāo) [?p??.m?.n?ns]美式音標(biāo) [?p??.m?.n?ns]國際音標(biāo) ['p?:m?n?ns]英式發(fā)音 美式發(fā)音 基本解釋n.永久;持久詞根記憶per(始終) + man(拿住) + ence→始終拿著→永久,持久同根派生adj性質(zhì)的同根詞permanent:永久的,永恒的;不變的。adv性質(zhì)的同根詞permanently:永久地,長期不變地。n性質(zhì)的同根詞permanent:燙發(fā)(等于permanen ave)。permafrost:永久凍土,永久凍地;永久凍結(jié)帶;永久冰凍。permanency:永久;耐久性;永久的事物。permanence相關(guān)詞英漢例句The spoken word is immediate but lacks permanence.口頭之言便捷,但缺乏持久性。Anything which threatens the permanence of the treaty is a threat to peace.任何對(duì)條約持續(xù)生效構(gòu)成威脅的因素都將危及和平。They gradually realized the permanence of their condition.他們漸漸意識(shí)到他們的這種狀況將永久地持續(xù)下去。The spoken word is immediate but lacks permanence.口頭之言便捷,但缺乏持久性。Anything which threatens the permanence of the treaty is a threat to peace.任何對(duì)條約持續(xù)生效構(gòu)成威脅的因素都將危及和平。permanence更多例句詞組短語短語Permanence Gallery 久畫廊water permanence 耐水性Suggesting Permanence 讓人聯(lián)想永恒Synapse permanence 突觸的永久性transience permanence 頃刻permanence更多詞組英英字典劍橋英英字典 staying the same or continuing for a long timepermanence劍橋字典permanence柯林斯字典專業(yè)釋義數(shù)學(xué)持續(xù)生存Finally, by using the method of topological degree, we obtain the existence of positive periodic solution of three species predator-prey system with nonautonomous delay. We also discuss the effect of delay on permanence and periodic solutions of the system.利用拓?fù)涠鹊睦碚摻o出了具有時(shí)變離散時(shí)滯的三種群捕食食物鏈系統(tǒng)正周期解的存在性,得到了時(shí)滯的大小對(duì)種群的持續(xù)生存及系統(tǒng)周期行為的影響。持久, and the disease is uniformly persistent if the period of pulsing is larger than r* (or T*). The permanence of the models is investigated analytically.通過分別對(duì)這四類模型的研究,得到了系統(tǒng)無病周期解全局吸引和系統(tǒng)一致持久的充分條件;并且得到當(dāng)脈沖周期小于Υ_*(或γ_*)時(shí)疾病將會(huì)滅絕,當(dāng)脈沖周期大于Υ_*(或γ_*)時(shí)疾病將成為地方病。一致續(xù)存In our paper, we have comprehensively discussed the permanence of predator-prey systems and the impact of prey refuges on their dynamics and obtain the following main results:1.本文系統(tǒng)的討論了具有階段結(jié)構(gòu)的捕食——食餌系統(tǒng)(包括多物種食物鏈系統(tǒng))的一致續(xù)存和庇護(hù)所效應(yīng)對(duì)其動(dòng)態(tài)結(jié)果的影響。生物學(xué)一致續(xù)存In our paper, we have comprehensively discussed the permanence of predator-prey systems and the impact of prey refuges on their dynamics and obtain the following main results:1.本文系統(tǒng)的討論了具有階段結(jié)構(gòu)的捕食——食餌系統(tǒng)(包括多物種食物鏈系統(tǒng))的一致續(xù)存和庇護(hù)所效應(yīng)對(duì)其動(dòng)態(tài)結(jié)果的影響。計(jì)算機(jī)科學(xué)技術(shù)永久性機(jī)械工程永久性交通運(yùn)輸工程永久性化學(xué)耐久性