crude 指天然的非人工合成的，直接从自然界提取的
crude的原义是“天然状态的”,在修饰物时指的是“未加工的”、“粗糙的”.在修饰人或思想、行为时,指的是“未开化的”、“低级的”、“粗鲁的”
I've never appreciated his crude sense of humour.
我从不欣赏他那低级趣味的幽默.
However,boxing was very crude,for there were no rules and a prize-fighter could be seriously injured or even killed during a match.
然而,当时拳击非常粗野,因为没有规则,在比赛中职业拳击家可能受重伤,甚至被打死.
Yet there is little resemblance between these crude vehicles and a modern scientific ballon,…
然而这种原始的运载工具与现代科学性的气球之间很少有相似之处.
raw在修饰物时,意思是“生的”（即未加工处理的）、“未熟的”.如raw meat（生肉）,raw eggs（生蛋）,raw material（原材料）,raw hides（生牛皮）等等.在修饰人及思想、行为时,raw指的是“未成熟的”、“无经验的”、“不老练的”
They are raw recruits.
他们是些新兵.
追问牛津词典 raw:not yet organized into a form in which it can be easily used or understood 未经处理的；未经分析的；原始的