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CrashCourse · 发布于 2012年7月2日
Hank continues our exploration of animal phyla with the more complexly organized annelida and arthropoda, and a biolography on insects. References: http://www.sciencedaily.com/releases/2010/07/100726222316.htm http://tlc.howstuffworks.com/home/earthworm-appreciation-day.htm http://annelidsf.blogspot.com/ http://www.bukisa.com/articles/41743_amazing-facts-about-arthropods#ixzz1sXW1Jigp http://www.ehow.com/about_6292974_interesting-crustaceans.html Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids
