unschooling is easier for parents because they need not plan lessons or grade tests but more difficult in that learning is ever-present and collaborative.

these are newbie questions in the world of unschooling, and i won't answer them all here.

对于非学校教育，这些都是新问题，我在这里也不能一一作答。

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unschooling expands from children's natural curiosity as an extension of their interests, concerns, needs, goals, and plans.

非学校教育从孩子天生的好奇出发，拓展成他们的兴趣、交注、需要、目标和计划。

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unschooling's interest-based nature does not mean that it is a "hands off" approach to education;

非学校教育虽然具有兴趣导向的本质，但并不意味着对教育“撒手不管”；

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unschooling is a way of life that has many advantages over conventional schooling.

非学校教育是一种生活方式。

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it is suggested at the same time that appropriate uv lens, uv image intensifier, correlative uv homochromy filter and special image disposal software must be developed.

展望了其发展前景，其关键技术是研制合适的紫外镜头、紫外光像增强器、相关的紫外光单色滤光器和专用的图像处理软件。

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if you have a high-end camera, the lens probably has screw threads, which means you can add a uv or skylight filter ( available at your neighborhood camera shop).

如果你有一架高档相机，那么它的镜头上可能有螺旋纹，这表明你能增加一个紫外或者天窗过滤器（附近的相机店里有售）。

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al. observation of surface sunny ultraviolet radiation is mainly done by the uv spectroradiometer and filter ultraviolet radiation meter.

紫外线辐射强度的观测主要使用紫外光谱辐射计与滤光片式的紫外辐射表。

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i was observing everything with concern, and i was checking the view in the uv filter of my nikon.

我一直在关注这一切，并调整着我的尼康相机UV滤色镜的视角。

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a new uv filter to protect hair from color fading and integrity damaging

防止头发褪色和头皮损伤的新型紫外线过滤剂

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ssr technique and development of the study in fruit science

SSR技术及其在果树上的应用

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general situation of application of computer in research of fruit science in china

计算机在我国果树科学中应用研究概况

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international journal of fruit science

国际水果科学杂志

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Forecasting on Development of Science and Technology in the 21st Century

21世纪科技发展预测

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Trend of Development of China Library in the 21st Century

新世纪中国图书馆的发展趋向

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Control systems in 21st century are combined systems of control and network.

21世纪的控制系统将是网络与控制结合的系统。

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ETT& Lead the High-speed Transportation of the 21st Century

ETT&引领21世纪的高速运输

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the zero adjustment and full range adjustment for model wfz& 753 uv vis spectrophotometer is modified with a microcomputer. the principles and methods for realizing automatic control are described.

阐述了利用微机来改造WFZ&753紫外可见分光光度计的原理及方法，实现了调零调满量程的自动控制。

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the distribution of camptothecin and its ring opened form was studied by first derivative ratio spectrum of uv vis absorption and fluorescence spectrometry in different ph aqueous buffer solutions.

为了研究喜树碱的药理性质，用比导数荧光光谱和紫外吸收光谱法分析了喜树碱在不同pH介质中的形态分布。

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on line monitoring in photocatalytic degradation process of organic compound 4 chlorophenol ( 4 cp) was carried out by using cyclic voltammetry and uv vis spectrometry.

采用循环伏安法和紫外光谱法对有机物的光催化降解进行机理研究和在线监测。

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summary uv vis spectroscopy and molecular size distribution of water soluble organic carbon ( wsoc) of 45 soil samples collected from the eastern part of china were determined.

测定了中国中东部地区17种土类45个样点近表层10cm土样中水溶性有机物的紫外光谱和分子量分布特征，同时测定部分样品富里酸的相应特征。

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