With digital photographs, the art is now in creating black and white images. This course will teach you how to use Photoshop techniques to create beautiful images.
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這是來自於加州大學爾灣分校的國家燃料電池研究中心(National Fuel Cell Research Center)的主意，原理說來也不難理解，我們的排泄物中含有非常多有機物，經微生物分解以後，會產生沼氣，其中富含甲烷(CH4)，也就是說天然氣的主成份，在工業上，甲烷有多種方法可以製造氫氣，包括水合法、水合及部分氧化法以及裂解法等等，所以，利用便便製造氫氣，在化學原理上確實是可行的。
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特斯拉 CEO 穆斯克（Elon Musk） 2013 年 10 月底到慕尼黑剪綵特斯拉的新落成服務中心時，致詞中表示：不相信電動車的人，常會看扁某些技術，比如說「燃料電池真是狗屎一般，除了用在火箭上」。這段話被斷章取義，一時間，「穆斯克稱燃料電池為狗屎」的消息四下傳播，為他帶來不少公關上的麻煩，結果燃料電池還真的跟屎扯上關係了。
