单词:X-ray(powder)diffraction
单词:X-ray(powder)diffraction 相关文章
今天要讲的习惯用语都由这样一个关键词发展而来 : powder。 大家一定知道powder是粉, 可以是扑脸的香粉,也可能是治病的药粉或者爆炸的火药,种类繁多。今天要学的第一个习惯用语是:
A: My doctor said that I need a chest X-ray. B: Just take your clothes off from the waist up and put this gown on, with the opening in the back. A: What should I do after that? B: You need to come over here and face this plate. A: Am I standing the r
Suspicious Powder Discovered on Capitol Hill Deborah Tate Three U.S. Senate office buildings are closed, and congressional business has been disrupted a day after a suspicious powder, believed to be t
今天要讲的美国俚语由powder发展而来。大家一定知道powder是粉,可以是扑脸的香粉,也可能是治病的药粉或者爆炸的火药,种类繁多。今天要学的第一个习惯用语是: take a powder。 习惯用语t
今天要学的习惯用语是: keep one's powder dry。在keep one's powder dry这个习惯用语里,powder指枪炮用的火药。以前步兵和水兵把火药装在火药桶里保持干燥,随时取用。要是哪个粗心大意的士兵忘了