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.A notably short, silver-haired man, he plays basketball with his staff several times a week.他个子明显较为矮小,一头银发,每周都会和...
随着一天天的过去,露营者的食物逐渐减少了.The campers'food supply gradually diminished as the days wore on.露营者用营火点燃火把.The campers lit torches from the campfire.露营者去搜寻柴木点火.The campers went foraging for wood to make a fire....