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sediment，precipitate，subside，deposit，deposition ；

[例句] 一旦杂质沉淀下去，油就可以分级了。 Once its impurities had settled, the oil could be graded.

[例句] 将硫酸盐加入该溶液会产生沉淀. Adding sulphate to the solution will give a precipitate.

[地] deposit，sedimentation，deposition，precipitation，aggradation ；

[例句] 海洋微生物腐烂后沉积形成磷酸盐。 The phosphate was deposited by the decay of marine microorganisms.

[例句] 每年河水泛滥时都会在田野上沉积一层淤泥. During the annual floods the river deposits its silt on the fields.

subside，settle，[地] sedimentation，settlement ；

[例句] 沉降池中的废水中加入了消毒剂，以消灭所有有害微生物。 Effluent from the sedimentation tank is dosed with disinfectant to kill any harmful organisms.

[例句] 控制颗粒污染物的技术包括过滤 、 洗涤 、 离心分离 、 静电沉降. Techniques for controlling particulates include filtering, washing, centrifugal separation, and electrostatic precipitation.

sink，subside，cave in，submerge，go down ；

[例句] 布莱克很熟练地跳上了船，他的重量使小船微微向下沉了沉。 Blake jumped in expertly; the boat dipped slightly under his weight.

[例句] 救生船撞上了那艘正在下沉的船的侧身。 The lifeboat crashed against the side of the sinking ship.

sink，[地质] submergence，go to the bottom，sinking，went under ；

[例句] 沉没的帆船在海底闪烁着白光。 The sunken sailing-boat was a glimmer of white on the bottom.

[例句] 轮船连同其所有的船员一起沉没了。 The ship went under, taking with her all her crew.

reticent，taciturn，uncommunicative，silent，dumbness；

[例句] 盖尔镇定地注视着哈里，沉默了片刻。 Gail was silent for a moment, regarding Harry with his steady gaze.

[例句] 沉默背后的骇人真相慢慢显露出来。 The chilling facts behind this veil of silence were slow to emerge.

cool-headed，composed，deposition，steady，aplomb ；

[例句] 她是个非常沉着的人。没什么能让她惊慌的。 She was a very calm person. Nothing could fluster her.

[例句] 每个人都必须冷静沉着地仔细考虑这一情况。 Everyone must think this situation through calmly and coolly.

dead，quiet，still，no news，dreariness ；

[例句] 一声尖叫打破了这可怕的沉寂。 The unearthly silence was broken by a shrill screaming.

[例句] 直升机的嗡嗡声打破了沉寂。 The silence was broken by the whirring of a helicopter.

downhearted，low-spirited，dejected，depressed，depression ；

[例句] “我要是那样做了就好了，”菲尔·乔丹说道，又像往常一样消沉起来。 "I wish I did," said Phil Jordan, relapsing into his usual gloom.

[例句] 冬季天短，有些人会变得抑郁消沉。 When the days shorten in winter some people suffer depression.

quiet，calm，serene，stillness ；

[例句] 他站在走道里，听着她那沉静而规律的呼吸声。 He stood in the doorway, listening to her quiet, regular breathing.

[例句] 盘腿而坐的神像散发出智慧与沉静的气息。 The cross-legged deity exudes wisdom and composure.

overcast，lowering，low and deep，low-spirited ；

[例句] 伴随着隆隆的低沉噪声，螺旋桨开始旋转起来。 With a low-pitched rumbling noise, the propeller began to rotate.

[例句] 从走廊里隐约传来了低沉的说话声。 There were low, muffled voices rising from the hallway.

[建] [土] caisson，float case，sinkbox，cofferdam ；

[例句] 一、游艇码头 、 交通码头 、 旅游码头 、 客运码头 、 渔人码头 、 高桩码头 、 重力码头 、 沉箱结构码头、浮动码头 、 浮桥 、 工程咨询 、 设计 、 施工. Yacht marina, transport marina, travel marina, pontoon, passenger transport marina, fishing marina, piling dock, heavy load dock, caisson dock, engineering consulting, design, construction.

[例句] 它们是在英国用混凝土分体浇注技术建造的,由两部分组成:混凝土沉箱和浮动码头. On June 19, artificial ports were shipped to the coast of Normandy.

indulge，wallow，enthrallment，enthralment ；

[例句] 不要过沉迷于酒色的生活. Don't lead a dissipated life.

[例句] 安东尼沉迷于埃及女王克娄帕特拉的美色, 失去了斗志. Infatuated with Queen Cleopatra of Egypt, Antony lost his will to fight.

（瑞香料常绿乔木） eaglewood，agalloch eaglewood，ligaloes，lignaloo ；

[例句] 沉香: 妈妈, 它为什么是盏神灯 呢 ? Chen Xiang: Mom, How this could be a magic lantern?

[例句] 成分描述: 沉香叶 、 木香、艾纳香 、 大豆蜡等. Ingredient: Agallochum leaves, wormwood , Herb of Balsamiferou Blumea, soy candle etc.

[地质] sediment(ary)，deposit sediment，settlings ；

[例句] 泥质沉积物沉积后, 体积的70-80%是水. When deposited , 70 - 80 % of the volume of muddy sediments may be water.

[例句] 河床沉积物一般比邻近的泛滥平原沉积物粗些. Channels generally contain coarser sediment than do the adjacent flood plains.

indulge，wallow，welter ；

[例句] 这部电影大部分都在描述那位画家如何完全沉溺于自己的工作。 Much of the film shows the painter simply going about his task.

[例句] 他疲惫的心继续沉溺于自哀自怜之中。 His tired mind continued to wallow in self-pity.

heavy，serious，critical，heaviness，ponderosity ；

[例句] 他现在正为酗酒付出沉重的代价。 He drank too much and is paying dearly for it.

[例句] 他匆匆地迈着沉重的步伐绕过湖边向花园走去。 He tramped hurriedly round the lake towards the garden.

immerse，steep，immersion ；

[例句] 他沉浸在自己想象的世界中。 He submerges himself in the world of his imagination.

[例句] 游泳的时候，我沉浸在自己的世界里。 When I'm swimming I'm in a world of my own.

cloudy，overcast，gloomy，sombre，cloud；

[例句] “没错，梅格。”他用冰冷、阴沉的声音答道。 "That is correct, Meg," he answered in his cold, dead voice.

[例句] 黎明时分天气阴沉，云幕低垂。 The day dawned sunless and with a low cloud base.

get drunk，become intoxicated，[医] ebriety （嗜酒中毒） ；

[例句] 她沉醉于婚后幸福的浪漫幻想。 She clings to a romantic fantasy of wedded bliss.

[例句] 迈克尔抓着她的手臂，沉醉于音乐中。 Michael held on to her arm, losing himself in the music.