Make sure your glasses have both UVA and UVB protection and that they block light from the top and sides.
你的眼镜要能防uva还能防uvb，眼镜的上面及两边都不能透光哦。
Baby falls asleep and gets restful sleep with our Sleepy hat because the flip-down mask works to block light and visual stimulation out.
有我们的安睡帽子，宝贝可以轻松进入梦乡，并得到优质的睡眠，因为翻下来的帽子可以遮挡光线和视觉刺激。
LCD displays also use shutters, in effect, consisting of liquid-crystal elements whose polarisation can be changed to block light or let it pass.
实际由液晶分子组成的LCD显示屏也采用了百叶窗，分子的极化转变可阻挡光或让其通过。
Pursuing protectionism is like locking oneself in a dark room. While wind and rain may be kept outside, that dark room will also block light and air.
搞保护主义如同把自己关进黑屋子，看似躲过了风吹雨打，但也隔绝了阳光和空气。
Ordinary cameras use filters to block any light in the infrared spectrum.
普通相机用滤光片来阻隔红外光谱范围内的任何光线。
Ferns can grow in dim lighting conditions, which can be caused when particles churned out by volcanoes block out natural light.
由于火山喷发，细小的粉尘颗粒阻挡了自然光线的照射，而蕨类植物却可以在光线昏暗的条件下自由生长。
I had only gone a half a block at most very slowly when I saw a very bright light through the fog.
车子慢吞吞的走了将近一半的路程，透过雾气我看见一片亮光。
BLOCK: Do you stop and think, Kathryn, that this supernova is 240 million light-years away?
布洛克：凯瑟琳，你有没有停下来想过，这颗超新星远在2亿4千万光年之外？
To eliminate this effect, you can place a small piece of opaque material or black foam just long enough to block the direct part of the light from hitting your subject.
为了消除这种效果，可以在闪光灯灯头上加一片不透明材料或黑色塑料泡沫板做的遮光片，以阻挡扩散的光线照射到被摄体。
On the flipside, amber and red light can be used to block out blue light to help relieve insomnia and overstimulation.
琥珀光和红色光可以被用来阻止蓝光，从而减轻失眠和过度刺激水平。
To protect your eyes, it is important to wear sunglasses that block out harmful UV light.
为了保护我们的眼睛，戴上太阳眼镜阻挡紫外线伤害是很重要的。
Researchers now believe that full sunscreen blockage is not necessarily good in sun creams because they block certain wavelengths of light needed to trigger the body's natural defences.
研究人员们现在认为全面防护型的防晒霜未必是好的防晒产品，因为它们阻挡了某些能够激发人体自动防御功能的光波。
We also wrapped the core column with light-transmitting bamboo boards to form a light-box, which transforms the previously heavy concrete block into a light and lively focus object.
我们也八核心柱用透光竹板包裹成一个“光箱”，从而使原来凝重的混凝土体块变成轻快、生动的视觉中心。
In light of our observation it seems as if we should be able to optimize access in the case where a thread is looping over a synchronized block of code.
根据我们的观察，我们似乎需要对一些锁的访问进行优化，比如线程执行的同步块代码在一个循环体中。
So, avoiding sleeping with a night-light, not falling asleep with the bedroom TV on all night long, and perhaps using dark curtains to block out street light might be a good idea.
因此，避免晚上开着夜灯睡觉，避免晚上开着电视睡觉，另外，用一个黑色窗帘来阻挡路灯的灯光是个好办法。
Their ability to see in slightly lower light than native stingless bees gives the honeybees a competitive advantage at night. Earlier in the day the natives often block access to flowers.
当光线较弱时，非洲蜂的视力比本地麦蜂要更好，因此它们在晚上觅食更有优势，而白天的花朵则被本地麦蜂所霸占。
Make sure that your blinds can block out any light that might come in, and that your room stays at a comfortable temperature.
确保你的窗帘能阻隔任何光线进入，室内温度适宜。
Above: WISE penetrated curtains of dust that block visible light to capture this hidden star-forming region in the constellation Cepheus.
上图：这是隐藏在仙王座(constellation Cepheus)中的一片恒星形成区域，WISE望远镜穿透了阻碍可见光的尘埃幕帘，捕获了这张照片。
To investigate this effect, Clements and his team placed screens over small segments of a dozen mountain streams to block ultraviolet light, and left them there for 60 days.
为了调查由此产生的影响，克莱门茨和其研究小组选取了十几条山间溪流，将遮盖板放置在溪流的某一段以阻挡紫外线对溪床的照射。
The protective earth dike shall be earth-filled. no rock brick and concrete block or light and flammable material shall be allowed for filling.
防护土堤应用土填筑，不允许使用石块、砖块及混凝土块或者轻而可燃的材料填筑。
Wear sunglasses big enough to block the light from above and below - they should have thick sides or wrap around.
你应当佩戴那种足够大，从上方下方都能阻挡紫外线的太阳镜——这种太阳镜应是厚边儿或者包住眼睛的(即镜框接触到眼睛上下方的皮肤)。
City traffic engineer Joe Olson said traffic engineers plan to update the city's Opticon system this year to block unauthorized light-changing signals.
朗蒙特市交通工程师奥尔森指出，他们计划在今年更新该市的Opticon系统，查处那些未经许可擅自使用的改变信号灯装置。
The impression block is landed on top of the fish with a sharp, light force.
用一个敏捷的很轻的力，将印模坐放在落鱼的顶部。
Features: small volume, light, easy to use, broad filtering area, low block rate, high filtering speed, no pollution, good heat stability and chemical stability.
其特点是体积小、重量轻、使用方便、过滤面积大、堵塞率低、过滤速度快、无污染、热稳定性及化学稳定性好。
Yet older oaks cast shade that enable maple seedlings to grow and maple trees block the light that young oaks need.
然而，较古老的橡树投射下来的树荫使枫树的幼苗开始生长，枫树却遮挡了小橡树需要的阳光。
All the way by Guan Ling Cun of block stone and gravel, gravel and wall transfer overgrown with moss, like a long green light time corridor, leading to unpredictable future.
官岭村所有的道路采用块石和卵石铺砌，卵石与墙基交接处长满了苔藓，悠悠的青光如同一条条时间长廊，通向不可预知的未来。
Under the glass block, light is refracted on passing through the glass.
在玻璃棒下面，光穿过玻璃后发生折射。
Under the glass block, light is refracted on passing through the glass.
在玻璃棒下面，光穿过玻璃后发生折射。
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