crucial
a.决定性的；重要的；定局的；决断的
[例] At the crucial moment,he showed great foresight and turned back the powers of darkness.
在关键时刻，他高瞻远瞩，力挽狂澜。
He spoke briefly but grasped the essence of the problem,and brought out the crucial point.
话虽然简短，但是抓住了问题的本质，起到了画龙点睛的作用。
It's a crucial decision.
这是一个极其重要的决定。
[同（近）义词]
critical decisive important urgent
crude
a.天然的，未加工的；简陋的；粗鲁的
[例] Gasoline is distilled from crude oil.
汽油是从原油中提炼出来的。
I condemn such crude manners.
我痛恨这种粗鲁的态度。
I've never appreciated his crude sense of humour.
我从不欣赏他那低级趣味的幽默。
[同（近）义词]
raw rough vulgar
cruel
a.残酷的，残忍的
[例] a cruel master
残忍的主人
It hurt me something cruel.
这事深深地伤害了我。
[同（近）义词]
bloody brutal ferocious inhumane merciless ruthless
cruelty
n.残忍，残酷行为
cruise
ui.／n.巡航；航游
crumble
vi.崩溃；破碎，粉碎
[例] Her hopes crumbled to nothing.
她的希望落空了。
