A steam explosion pretreatment, which is one of the best ways of pretreating plant stalk, is applied at various severiti......

近日卡西尼土星探测器拍摄的高分辨率照片显示，在土卫二（Enceladus）南极区域有间歇性的冰颗粒和水蒸汽喷发现象存在。科学家据此推断......