Astronomers used to ask why only Saturn has rings.天文学家们过去一直感到奇怪,为什么只有土星有光环.Saturn was to launch the 15 th flight, a Moon orbital mission.第15次飞行利用萨杜恩将飞船送人月球轨道.The Saturn family of launch vehicles falls into three types or...
他的投球在大联盟的击球员中是个传奇。His pitching was a legend among major league hitters.我干脆利落地击球，命中了目标。I struck the ball cleanly and my shot was on target.这位19岁的佐治亚州人并不是比赛中的优秀击球手之一。The Georgian, aged 19, is not one of the game's big...
采用新的管式反应器装置代替釜 式 反应器,将生产7-ADCA和7-ACA的副产物六甲基二硅醚有效地转化成了三甲基氯硅烷.Trimethylchlorosilane was prepared from hexamethyldisiloxane, by - product in producing 7 - ADCA and 7 - ACA.以三甲基硅醚和氯化氢气体为原料, 浓硫酸为催化剂合成了三甲基氯硅烷.Chlorotrimethylsi...
Below the lithosphere is the rheosphere comprising partly fused peridotite.岩石圈之下是由部分熔融的橄榄岩所组成的软流圈.The molecules comprising this particle are continuously changing.组成该质点的分子是连续变化的.For a system comprising two or more object...