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时差N小时:富兰克林与电荷试验(上)

When they hear the name Ben Franklin, many folks think of the Declaration of Independence, the Conti ...

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时差N小时:尼亚加拉大瀑布正在消失(下)

The rate of erosion depends on factors like the volume of water going over the edge, the height of t ...

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时差N小时:黄金是黄色的吗?(下)

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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时差N小时:黄金是黄色的吗?(上)

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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时差N小时:月球表面的记号为何不消失?(下)

Leave your Earth pan outside. Take the moon pan inside and place a cardboard box over the top of it, ...

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时差N小时:月球表面的记号为何不消失?(上)

In 1969 when Neil Armstrong said “That's one small step…”, he made a lasting impression.1969年, ...

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时差N小时:为什么生病的时候容易脱水?(下)

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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时差N小时:为什么生病的时候容易脱水?(上)

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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时差N小时:大快朵颐能增加营养吸收?(下)

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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时差N小时:大快朵颐能增加营养吸收?(上)

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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时差N小时:为什么吃完还会饿?(下)

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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时差N小时:为什么吃完还会饿?(上)

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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时差N小时:富兰克林靠风筝发现了电?(下)

What Ben actually did in his famous 1752 experiment was to cause some excess electrical charge near ...

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时差N小时:富兰克林靠风筝发现了电?(上)

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 ...

浏览:183004 | 喜欢: 10.8k

时差N小时:富兰克林与电荷试验(下)

That's why he was hanging them by strings; when they are free to move, you can easily see the attrac ...

浏览:441927 | 喜欢: 22.1k

时差N小时:火是什么 What is the fire

It's one of our most important tools, and holds a prominent place in many ancient philosophies and r ...

浏览:467126 | 喜欢: 23.4k

时差N小时:危险的月球尘埃

Don: Hey Yaël, I was wondering–why don't we hear much about the moon anymore? 嘿,Yaë ...

浏览:307758 | 喜欢: 19.2k

时差N小时:男友的言论引发危机

Dear Annie: 亲爱的Annie: I've been dating "Josh" for just over a month. 我和Josh已经约 ...

浏览:394518 | 喜欢: 21.9k

时差N小时:不切实际

Castles are usually enormous structures requiring strong foundations and the use of heavy constructi ...

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时差N小时:市场购物 Market Shopping

Mike: Wow! There's so much fresh produce here. Half of it looks like it was growing in the fields t ...

浏览:278934 | 喜欢: 13.9k

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