单词:heterogeneous propellant powder
单词:heterogeneous propellant powder 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:
In the course of a long life Cavendish made a string of signal discoveriesamong much else he was the first person to isolate hydrogen and the first to combine hydrogen and oxygen to form waterbut almost nothing he did was entirely divorced from stran
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
My editor at Geographic 我地理学的编辑 wanted me to find America's Blue Zone. 想让我找个美国的蓝区。 And for a while we looked on the prairies of Minnesota, 一时间我们观察了明尼苏达草原, where actually there is a ver