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When they hear the name Ben Franklin, many folks think of the Declaration of Independence, the Conti ...
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The rate of erosion depends on factors like the volume of water going over the edge, the height of t ...
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If most gold jewelry is an alloy, why is some white and some yellow?如果大多数黄金首饰是合金的话,为 ...
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Many people associate the metal gold with the color gold.很多人认为金子应该是金色。But, some gold je ...
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Leave your Earth pan outside. Take the moon pan inside and place a cardboard box over the top of it, ...
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In 1969 when Neil Armstrong said “That's one small step…”, he made a lasting impression.1969年, ...
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Two key ingredients of metabolic reactions are water and oxygen.新陈代谢作用的两大关键因素是水和氧。 ...
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When you have a cold or flu, the doctor (or Dr. Mom) may tell you to drink lots of fluids.当你不幸感 ...
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The researchers believe the answer's in the brain. Before you eat a bite, there's a brain phase of d ...
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Enjoying Your Food Increases The Nourishment Your Body Receives大快朵颐能够增加营养吸收Did last nigh ...
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For lunch one day, the women were served pasta salad.某天的午餐,我们为这些女性提供了意面沙拉。The n ...
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You've just snacked on rice cakes.你刚刚吃完米糕。Why are you still hungry?为什么还是觉得饥肠辘辘?T ...
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What Ben actually did in his famous 1752 experiment was to cause some excess electrical charge near ...
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Did Ben Franklin really discover electricity with a kite?本.富兰克林靠一只风筝发现了电?That's a goo ...
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That's why he was hanging them by strings; when they are free to move, you can easily see the attrac ...
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It's one of our most important tools, and holds a prominent place in many ancient philosophies and r ...
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Don: Hey Yaël, I was wondering–why don't we hear much about the moon anymore? 嘿,Yaë ...
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Dear Annie: 亲爱的Annie: I've been dating "Josh" for just over a month. 我和Josh已经约 ...
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Castles are usually enormous structures requiring strong foundations and the use of heavy constructi ...
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Mike: Wow! There's so much fresh produce here. Half of it looks like it was growing in the fields t ...
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