belt n. 1.带,皮带;绶带;线条;带状物。 2.【机械工程】传动带;【天文学】云状带;【军事】子弹带;腰皮带;单层铁丝网;(战舰)吃水线以下的装甲带;(飞机)保险带。 3.〔美国〕产区;地带,区域。 4.〔美国〕环行电车[铁路]线。 5.〔美俚〕抽打;〔美俚〕快感,刺激。 a leather belt 皮带。 a waist belt 腰带。 a sword belt 剑带。 the cotton belt 产棉地带。 a green belt (都市)绿化区。 the marine belt 领海。 He caught me a belt on the ear. 他用皮带抽了一下我的耳朵。 the Great [little] Belt (由北海通至波罗的海的)大[小]海峡。 the Black Belt 1. 美国南部黑土地带。 2. 美国南方[城市]黑人多于白人的地区。 hit [strike] below the belt 【拳击】击对手腰带下部犯规行为;【口】卑劣行为,玩卑鄙手段,暗箭伤人。 hold the belt (在拳击等比赛中)夺得锦标。 tighten [pull in] one's belt 〔讽刺语〕勒紧肚带,饿着肚皮;含辛茹苦;紧缩开支。 under one's belt 〔俚语〕 1. 在肚皮里。 2. 已有经验。 vt. 1.在…上系带子。 2.用带扎上。 3.佩带(剑等)。 4.环绕。 5.用皮带抽打;〔口语〕痛打。 6.〔口语〕大声唱。 7.〔美国〕环(状)剥(树皮)。 8.喝(酒) (down) 狂饮。 belt a sword on 佩剑。 vi. 急走,快速移动。 belt along the road 顺路急进。 belt the ball 【美棒球】打,连续打出稳球。 belt out 【美拳】打倒。 belt up 〔口语〕〔命令〕住口! 别响!〔口语〕系上座位安全带。
It ' s significant to further the study of the environment evolvement and forming mechanism , and this helps to open out its ecological essential , protect and develop the oasis , lacated in the cross belt which converge northeaster and northwester , yutian oasis was threatened by the ilowing sand , and has the bad nature conditions the main purpose of the paper is applying fractal theory to research on the change of transitional belt between oasis and desert , which is a typical ecosystem in arid zone 而荒漠与绿洲之间的植被带即过渡带则最为敏感、完整地记录了这两大生态系统之间的相互作用与相互转化,深入研究这一特殊地带的环境演变过程、特征及形成机制对于揭示其生态学实质、维护和发展绿洲具有重要的实践意义。于田绿洲位于东北风与西北风的交汇地带,受到流沙侵蚀的危害很严重,自然条件非常恶劣,生态环境异常脆弱,人民的生存环境受到了很大的威胁。
According to the analysis on the lithogeochemical features and the carbon and oxygen isotopes of calcareous sandstones , it is realized that there some genetic relation between the formation of calcareous sandstone and uranium mineralization in the oxidation - deoxidation transitional belt , that is the precipitation and enrichment of uranium is accompanied by the deposition of carbonate and formation of calcareous sandstone 根据钙质砂岩的岩石地球化学特征,结合碳、氧同位素分析认为,氧化还原过渡带中钙质砂岩的发育与铀矿化的形成具有一定的成因联系,即在铀沉淀富集成矿的同时,伴随着碳酸盐的析出作用,形成钙质砂岩。
Obtaining full and accurate information on the spot , basing on the fractal theory , fully using remote sensing image as the main research data and relative thematic map as reference data , aiding of pci which is a powerful image processing software of remote sensing technique , the land desertification and the change of transitional belt between oasis and desert in yutian county are analyzed quantificationally . the rational proposals are tabled for the desert controlling and area rebuilding in the future , furthermore , this paper deeply discusses and validates the effect of fractal approach applied in the desertification research 在实地考察研究区获得翔实资料的基础上,以分形为理论依据,充分利用多时相卫星遥感数字图像为主要资料源,参考相关资料,借助遥感图像处理分析软件pci操作平台,定量分析评价于田县的沙漠化状况及绿洲?荒漠交错带的演变趋势,为今后沙漠化的控制、改造工作提出合理化建议,并对分形理论在绿洲?荒漠交错带定量研究中的作用作深入地探讨和验证。
By this method , the new subject of fractal theory can be more used in environment protect and desertification harness . the model of fractal approach built on the research should be took effect on the local development and be auxiliary in local government ' s decision . to simplify the program of research and dynamically supervise the change of transitional belt by using quantificational index 通过这种研究方式的探索,使分形这一新兴学科进一步应用到绿洲生态环境保护,荒漠化评价治理等方面,所建立的分形模型希望能够对地区发展建设的决策起到一个辅助、参考的作用,通过数量化的指标动态监测、评价绿洲?荒漠交错带的演变,从而简化以往繁琐、复杂的研究过程。