单词:fencing swords
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Last time we talked about how astronauts eat and drink under weightless conditions in space. Today we'll cover the next question kids love to ask-how do astronauts go to the bathroom in space? It may sound silly, but it's really a good question, beca
It may sound silly, but its really a good question, because weightlessness does make a visit to the latrine a tricky proposition. Weightlessness poses two main problems in the bathroom. The first is that an astronaut could drift away from the bowl at
Galactic Rotation 银河系自转 Astronomers calculate there is ten times more matter in our Milky Way galaxy than we can actually see. Discover how the orbital motions of stars in the galaxy reveal dark matter -- on today's Earth and Sky. JB: I'm Joel
It might sound like the most unlikely of dating tips. 这听起来绝对不像是什么约会秘诀。 But guys, if you want to get the girl, forget the aftershave and try eating garlic instead. 但是伙计们,如果你想将那个妹子约上手,
Cannot fall, never do regret Know just what is being said know the risk you take Keep your head above it all Sure you can fall but not now you gotta prove something new, being you, being you Can't feel, keep from asking why be the strongest at goodby
Sure, you think the world is full of solid objects. You think the radio youre listening to is solid. You think the floor youre standing on or the chair youre sitting in is solid. Heck, you probably think that you yourself are a solid object. Wrong. O