Biotic: Of or having to do with life or living organisms.,生物的：生命或生物的，与生命或生物有关的.,Catchment: A catching or collecting of water, especially rainwater; A structure, such as a basin or reservoir, used for collecting or draining water.,集水：集水，尤指雨水的汇集收集;贮水池：一种用于收集或疏导水的装置，如盆或贮水容器.,New Words To transform (food) into living tissue by the process of anabolism; metabolize constructively.,生物的：生命或生物的，与生命或生物有关的; 吸收：消化后把营养消耗并吸收在体内,Pollination:授粉,artificial pollination 人工授粉 cross pollination 异花授粉 entomophilous pollination 虫媒传粉 legitimate pollination 正规传粉 open pollination 开放自由传粉,Grace n. 优美, 雅致, 优雅 To honor or favor 使增光：使荣耀或施恩： You grace our table with your presence. 你的到来使我们的台面增添了光彩 Out of favor with. 为人所厌恶 in the good graces of 为人所喜爱 cannot with any grace ask sb. 难以向某人启齿 an act of grace 恩典; (议会通过的)大赦令 Every lover sees a thousand graces in the beloved object. 情人眼里出西施。 by grace of 承蒙 fall from grace 堕落, 犯罪;【宗】失却天恩 get into sb. good graces 博得某人的欢心 good graces 好意, 友意; 宠爱 have the grace to (do) 有. 的雅量, 爽爽快快地.; 有勇气. in sb.s good graces 受某人照顾 in sb.s bad graces 受某人白眼 keep in sb.s good graces 讨好, 求宠 make onesgraces 行礼 say grace 做饭前祷告 with a bad grace 勉强地, 不情愿地 with an ill grace 勉强地, 不情愿地 with a good grace 高兴地, 欣然地 with an easy grace 态度自若,Translation,1) The level and nature of concern for these life forms changes over time, reflecting our understanding of the nature and importance of this legacy, the values we ascribe to it, the threats it is under and what might be done to conserve it.,2) The use of the term biodiversity grew out of a concern that efforts were needed to conserve, not just particularly charismatic animals, but the diversity of life around the world, including many plants and animals that will never grace a letterhead or be the focus of an international campaign.,3) In past decades, conservation efforts have been focused disproportionately on individual endangered species, particularly mammals, but this is costly and concerns have been raised about the adequacy of a species-by-species approach.,4) Indirect utilitarian values include the maintenance of “ecosystem services” or important ecological processes or weather, conserving the structure or fertility of soil, maintaining coastal function, assimilating or removing wastes from water or soil, maintaining evolutionary potential in ecosystems, sequestering carbon emissions, cycling of nutrients, pest control, and pollination of crops.,5) The major threat to biodiversity stems from land use. About 1%-2% percent of the Earths surface is devoted to urban use, but modifications of surface area are more extensive. Land acquisition for agriculture and forest products has intensified in many developing countries, which are experiencing rapid population growth. Introduction of species into new areas either by accident or intention, is a second major cause of threats to species.,Writing,1) What is the definition of biodiversity?,2) What are three levels of biodiversity?,3) What is direct utilitarian value associated with bioversity?,4) What are the major threats to biodiversity?,常用实验仪器名称中英文对照表,Preparation for Unit 5 -Greenhouse Effect Basics,See you next week!,