serious，solemn，earnest，grave，elevated ；

[例句] 即使是内容严肃的报纸也认为这是一次胜利。 Even the quality papers agreed that it was a triumph.

[例句] 烹饪课既是一件严肃的事又是一种享受。 The cookery course was serious and hedonistic at the same time.

inclement，ruthless，astringent，cruel，rigorous ；

[例句] 他找到了懂得用狂欢来冲淡战争的严酷的志趣相投的军官。 He found congenial officers who knew how to leaven war's rigours with riotous enjoyment.

[例句] 你太相信别人了, 严酷的现实是并不是每个人都像你那样诚实. You are too trusting; it's one of the hard facts of life that not everybody is as honest as you are.

austere，grim，rigorous，severe，flinty ；

[例句] 由于资源的减少，大学正面临严峻的问题。 Universities are facing grave problems because of diminishing resources.

[例句] 我有限的外交手腕儿受到了极其严峻的考验。 My limited diplomatic skills were tested to the utmost.

close，rigorous，tight，narrow ；

[例句] 水箱和屋顶都需要敷设严密的保温层。 Water tanks should be well lagged and the roof well insulated.

[例句] 从防守高度严密的监狱的集体越狱 a mass breakout from a top security prison

freezing，frigid，frosty，hyperborean，frore ；

[例句] 春天严寒的天气降低了母鸡的产蛋能力。 Freezing weather in spring hampered the hens' ability to lay.

[例句] 除了最严寒的冬季，这种植物都能在户外生长。 The plant will stand all but the worst winters out of doors.

gravely，sternly，soberly，solemnly ；

[例句] “那件衣服很好看，”迈克尔说。“谢谢，”她严肃地回答。 "That's a nice dress," said Michael. "Thanks," she replied solemnly.

[例句] 他们让我坐下，然后和我严肃地探讨了有关性的话题。 They sat me down and had a serious discussion about sex.

[医]severity，ponderance ；

[例句] 任何人都不该低估该问题的严重性。 No one should mistake how serious the issue is.

[例句] 现在全世界的人都已认识到了这个问题的严重性。 The scale of the problem is now universally recognised.

compact，precise，rigorous，strict，religious ；

[例句] 我有着清教徒般严谨的一面。 There'sa puritanical side to me.

[例句] 他鄙视不严谨的思维。 He despised loose thinking.

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[例句] 动物给严密地关了起来. The animals are kept in close confinement.

[例句] 所有的元件严密地连锁在一起. All the units interlock with one another rigidly.

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[例句] 从公设的基础上严谨地推演几何学. Geometry is developed rigorously from a postulational base.

[例句] 神秘;怪异;不安的感觉,沉着,严谨地充满了电影画面的每一帧. Blisteringly an eerie feeling of unease fills every meticulously composed frame.

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[例句] 前门锁上了，所有窗户都关严了。 The front door is locked and all the windows are firmly shut.

[例句] 把窗户关严了. Shut the window tight.

badly ；

[例句] 我们的朋友, 杰克森, 有被一辆汽车打, 不太严重地, 我们不想. Our friend, Jackson, has been hit by a car, not too badly, we don't think.

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