单词:reflex viewfinder
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Unit 31 Cut down on sugar. Unit 31 少吃点糖 Does chocolate make you blissful? Youre not crazy,youre simply responding to a natural pleasure chemical produced when you eat sweets. This chemical speeds to your brain, making you happy and leaving yo
Don: Time to go again to the A Moment of Science mailbag. Yal: A listener writes: Dear A Moment of Science, Scientists know that one day we'll run out of oil and other natural sources of energy. Beyond solar power and wind power and ethanol, what are
This is Scientific Americans 60-Second Science. I am Cynthia Graber. This will just take a minute. Solar panels typically convert sunlight into electricity or heat. But photosynthetic vegetation converts sunlight into chemical energy. Now M.I.T.s Dan
Battery 电池 A battery is a box of electricity. 电池是一盒电。 It stores chemical energy and this chemical energy changes into electricity. 它能储存可以转化为电能的化学能。 Can you name the things that need batteries? 你能列
Chemical Rush Brian Mcfadden Chess game, Im the pawn Youre the queen, Im the throne Take me out tonight Make your move, pick and choose Anywhere Im gonna lose Give it to me black or white Feel it coming on Like a pulse in my head Sending chills right
Amoment of crime scene investigation Ya?l: Hi Don, what are you... Don: Shh! I'm watching my favorite TV police drama: Crime Lab! Y: Oh, cool. Hey, what's that guy doing? D: Y'know Ya?l, you do have the right to remain silent... Y: Why is he spraying