双子星座后体处于分离状态.The flow over the Geimini afterbody is separated.通过优化引射器后体结构, 在SMC二级燃烧模式下工作的引射火箭可以产生较大的推力增强.By optimizing ejector combustor geometry, ejector rocket in SMC combustion mode can obtain comparable thrust augmen...
Evolution can explain why human embryos look like gilled fishes.进化论能够解释为什么人类的胚胎看起来象除去了内脏的鱼一样.A sharp demarcation of adventive embryos from zygotic embryos cannot be drawn.不定胚与合子胚之间不能划分出明显的界限.Most grass embryos have a fla...