The patient must re-enter a world full of problems and stresses.患者必须再次进入充满问题和压力的世界。The spacecraft slowed and began to re-enter the atmosphere.太空船减慢了速度，开始重返大气层。The force of friction affects the speed at which spacecraft c...
Ketenes, notably dimethyl ketene, readily undergo oligomerization and polymerization.烯酮, 特别是二甲基烯酮, 很容易齐聚和聚合.The purity of dimethyl disulfide was determined by capillary gas chromatography.应用毛细管气相色谱法测定二甲基二硫的纯度.Marine livi...
掌控你的操纵绳缓慢的并保持前进.Handle your brakes smoothly and progressively.当单边大夹时(左边), 保持另一边(右边)操纵绳压力并将身体移向那边(右边)压重.When slope is on your left, keep pressure and body shift on the right....