increase in life span 中文意思是什麼

increase in life span 解釋
延長壽命,壽命增長
  • increase : vt 增加，增大，增多；增強，增進 （opp decrease）。 increase speed 增加速度。 increase one s pace ...
  • in : adv 1 朝里，向內，在內。 A coat with a furry side in有皮裡子的外衣。 Come in please 請進來。 The ...
  • life : n （pl lives）1 生命，性命。2 一生；壽命；【原子能】（亞原子粒子的）生命期；使用期限，耐久性。3 ...
  • span : n 1 一?〈手指張開時，拇指尖至小指尖的長度，通常九英寸〉。2 （常有短的涵義的）一段時間；很小的間隔...
  1. Rubber tree ( hevea brasiliensis ) is an important economic woody - crop in tropical areas. its latex is the unique source of crude rubber used in current industry. because of its special and important use, the rubber tree has been extensively planted in tropical areas. increase production is always the main target in rubber tree cultivation. since the ethrel was applied in increasing latex production in 1968 for the first time as a chemical stimulant, not only the latex production had been increased largely, but also a new set of rubber tapping system had been established, leading to a series of economic benefit. owing to ethrel " s extensive application, its side effects had been found more and more obviously, such as tapping dry, speeding up senescence, shortening the life span of rubber tree etc. in order to overcome the side effects and increase production more availably, for a long time, people had carried out lots of research work on cell level, membrane level, physiology and biochemistry of laticifer contents. but the mech anism why ethrel increased latex production was not yet understood completely. this study had cloned the ethylene receptor gene ( efrl ) from rubber tree, and researched the relationship between etrl expression in laticifers and ethrel stimulation on transcription level and protein translation level. the results were as follows : 1

    但是，由於乙烯利應用的普及，乙烯利刺激割膠引起橡膠樹發生死皮病及加速膠樹衰老，縮短膠樹壽命等副作用也越來越明顯。為了克服這些副作用，使乙烯利能更有效地刺激增產，長期以來，人們在細胞水平、膜水平和乳管細胞內含物的生理生化層面上進行了大量的研究，但仍未完全了解乙烯對膠樹的作用機制。本研究從分子水平入手，克隆橡膠樹的乙烯受體基因（ etr1 ） ，並在轉錄水平和蛋白質翻譯水平上研究etr1基因在乳管細胞中的表達及與乙烯刺激的關系，取得了以下結果： 1
  2. Under present social economic condition, bridge design should satisfy criterions of design load and increase bearing capacity in order to strengthen service performance. these are contents of bridge structural optimization. diseases in superstructure make the life - span of bridges shortened

    在現今社會的經濟條件下，橋梁設計應該在滿足現行《橋規》設計荷載標準的前提下，適當提高橋梁的承載能力，增強其使用性能，而不是一味地強調造價最低，這就是橋梁結構優化的內涵。
  3. In rational foundation, it ’ s very of great significance and urgeny to improve the quality and service performance of asphalt pavement, increase the life span, improve the traffic capacity, ensure the traffic safety, maintain effect of investment and society

    在理性的基礎上，較大幅度提高瀝青路面的質量、改善公路的使用品質、增加使用壽命、提高通行能力、保證行車安全、維護投資效益和社會效益，十分迫切，具有重要意義。
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