化合物庚烷的主要用途是作为双基推进剂的增塑剂.The heptane compound has a primary purpose as a plasticizer for doublebase propellant systems.正庚烷异构化的难点在于高选择性地生成多侧链异庚烷和抑制异庚烷的裂化反应.However, it is difficult to produce multi branched i heptane and re...
More than 800 firefighters and police and 26 fire engines were mobilised.出动超过八百名消防员和警察和二十六部消防车.In Wyoming, firefighters are still battling the two blazes.在怀俄明州，消防员还在为扑灭这两场大火而奋战。The judge praised the firefighters for thei...
“ 我明白了, "嘉莉说, 然后, 露出一丝悦人的笑容, 走了出来." I see,'said Carrie, and then, half - smiling to be agreeable, she walked out.读书是打发闲暇的悦人的消遣.Read a book being the pastime delighting person send leisure's away.人们已经发现悦人的音乐会使人在...
The natural vegetation consisted of evergreen broad - leaved forest ever - green bushland, mangrove thickets and grassland.该地天然植被有常绿阔叶林 、 丛、树林、坡等....the thorn and bramble thickets.荆棘密布的灌木丛The delta region of the Rio Gran...
the barbarism of war战争的残酷We do not ask for the death penalty: barbarism must not be met with barbarism.我们不赞成死刑：不能以暴制暴。Barbarism ends with the production of grand barbarians.野蛮阶段随着伟大的野蛮人的成果而结束....