异地过年、私厨上门、外卖配送……其实,年夜饭吃法早就不拘一格,预订餐厅年夜饭更是流行多年,今年却是我家第一次改革。
Leonardo da Vinci is usually credited with conducting the first systematic study of friction in the late 15th century, a subfield now known as tribology that deals with the dynamics of interacting surfaces in relative motion. Da Vinci's notebooks depict how he pulled rows of blocks using weights and pulleys, an approach that is still used in frictional studies today, as well as examining the friction produced in screw threads, wheels, and axles. The authors of this latest paper used an experimental setup similar to da Vinci's.
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The British weren’t alone in their hunt. Chileans, New Zealanders, and South Africans, among others, were also scrambling to source this strategic substance. A few months after the Pearl Harbor attack, the U.S. War Production Board restricted American civilian use of agar in jellies, desserts, and laxatives so that the military could source a larger supply; it considered agar a “critical war material” alongside copper, nickel, and rubber.1 Only Nazi Germany could rest easy, relying on stocks from its ally Japan, where agar seaweed grew in abundance, shipped through the Indian Ocean by submarine.2
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直到2015年前后,我才见到阿爸的生父,那时他已经长时间卧床不起了,瘦得只剩骨架,脸色发灰,眼睛却还睁着。阿爸站在床边,还是和之前一样,叫了一句“客边”。后来,“阿英”和“客边”都相继去世了。