单词：tracheal ligaments
环状韧带,气管韧带
单词：tracheal ligaments 相关文章
Why Are Some People Double-Jointed? Can you bend your thumb backwards until it touches your wrist? If you join your hands behind your back, can you lift them over your head without letting go? If you can, you might be what some people call double-joi
发表于:2018-12-05 / 阅读(41) / 评论(0)
英语听力文摘 English Digest
英语听力文摘 English Digest
Can you bend your thumb backwards until it touches your wrist? If you join your hands behind your back, can you lift them over your head without letting go? 你是否能将大拇指向后弯曲直至其触碰到手腕部位？你将双手在背后紧握
发表于:2018-12-18 / 阅读(29) / 评论(0)
2018年NPR美国国家公共电台2月
2018年NPR美国国家公共电台2月
Why Is Gravity Good For Us? When astronauts return from long missions in space, their exit from the spacecraft is usually hidden from public view. This is because after several months in weightless conditions, things we usually take for granted, such
发表于:2018-12-31 / 阅读(49) / 评论(0)
英语听力文摘 English Digest
英语听力文摘 English Digest