despite claims about ancient astronauts and unidentified flying objects, there is no firm evidence for past visitations of the earth by other civilizations.

1、

patient sharing assemblies or group, patient visitations, self-help rehabilitation exercises, health seminar, recreational activities, community education programmes, newsletters, etc.

服务对象病友分享聚会，关怀探访，自助复康运动，医学讲座，社交康乐活动，社区教育，会员通讯。

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2、

mohammed is said to have experienced supernatural visitations during periods spent in meditation in the nearby mountains.

据说，穆罕默德在附近山中潜思冥想时曾经历了超然的巡视。

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3、

study on single tangent ring bar sprayed bubbling gas distributing desulphurization device

单切向环栅式喷射鼓泡进气脱硫装置的研究

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4、

the tourists from around the world are expected to flock to the southern german region for the18-day celebration of beer, sausages and good-natured rowdiness.

来自世界各国的游客将会涌向这个德国南部地区，以啤酒、香肠与友善的喧闹来举行为期18天的庆祝。

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5、

application of catalysis methods in odor treatment

催化法在恶臭治理中的应用

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6、

solid super acid in recent years concerned, become the focus of research of catalysis.

固体超强酸在近年来倍受关注，成为催化领域研究的焦点。

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7、

study on catalysis polymerization of pitch and preparation of micropore carbon

沥青催化聚合及微孔炭制备研究

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8、

the preparation of high performance epoxy resin by emulsion dispersing phase transfer catalysis

乳液分散相转移催化合成高弹环氧

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9、

this thesis follows three steps of exploration, namely analysis, catalysis and testing.

模式的构建经历三个步骤，即分析、综合和验证。

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10、

research on dynamics enzyme catalysis sucrose hydrolysis in reverse micelle system

反胶团体系中酶催化蔗糖水解反应动力学研究

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11、

study on the wet electric catalysis oxidation treatment of high concentration dye intermediate wastewater

微波催化合成肉桂酸戊酯高浓度染料中间体废水湿式电化学处理研究

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12、

purification of automotive exhaust by catalysis-assisted low temperature plasma

低温等离子体催化处理汽车尾气

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13、

synthesis, structure and catalysis of mesoporous catalytic materials with high oxidative activity

具有高氧化活性的介孔催化材料的合成及其结构与催化性能表征

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14、

the investigation of technology for the fat hydrolysis by the phase transfer catalysis

油脂相转移催化水解工艺研究

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15、

treating drilling sewage: chemical coagulation/ catalysis-oxidation method

化学混凝-催化氧化法处理钻井污水

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16、

study on air cleaning technology of nanometer tio_2 catalysis under plasma discharge

纳米TiO2等离子体放电催化空气净化技术的研究

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17、

research on catalysis model for vapor grown helical carbon fiber

气相生长螺旋状碳纤维催化模型的研究

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18、

a variety of influence factors of esterification and catalysis were also discussed.

讨论了催化酯化的各种影响因素；

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19、

methods: the target compound was synthesized by phase transfer catalysis.

方法：应用相转移催化法合成目标化合物；

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20、

study on environment-friendly catalysis using supported reagents solid acid

负载试剂型环境友好酸催化剂的研究

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