material + down
down 在此义项下为不可数名词，常与物质名词连用作定语。
This jacket is filled with goose down.
这件夹克填充了鹅绒。
羽绒；绒羽
进攻档；一档（橄榄球）；不利方面；缺点；镇静药；抑制剂；纵向（竖排）提示；一口喝下；一饮而尽
Soft, fine feathers, especially those covering young birds, used to fill quilts, sleeping bags, and jackets.
负面方面；令人沮丧的事物,缺点。
A negative aspect; a downer, a downside.
幼鸟身上的柔软绒毛,用作羽绒被、睡袋和夹克的保温材料
Soft, fluffy immature feathers which grow on young birds. Used as insulating material in duvets, sleeping bags and jackets.
羽绒
soft fine feathers
令人沮丧的事物,抑制剂。
A downer, depressant.
植物的茸毛；某些植物种子的毛冠,如蓟
The pubescence of plants; the hairy crown or envelope of the seeds of certain plants, such as the thistle.
进攻档
(American football) a complete play to advance the football
一口气喝完一整杯饮料的行为。
An act of swallowing an entire drink at once.
初长出的面部柔软汗毛
The soft hair of the face when beginning to appear.
发现唐氏综合征的英国医生(1828-1896)
English physician who first described Down's syndrome (1828-1896)
从球被开球(开始)到哨声响起(结束)期间的单次比赛,当球被放下或被放倒时。
A single play, from the time the ball is snapped (the start) to the time the whistle is blown (the end) when the ball is down, or is downed.
用羽绒制成的物品,如床或枕头；如羽绒床般舒适的东西
That which is made of down, as a bed or pillow; that which affords ease and repose, like a bed of down.
在填字游戏中答案垂直排列的线索。
A clue whose solution runs vertically in the grid.
在赌场或牌室中,发牌员管理某张桌子的轮班或时间段,通常为30分钟。
The shift or period of time during which a dealer manages a given table before rotating to the next table at a casino or cardroom, which is often 30 minutes.
两层楼房的一楼房间
A downstairs room of a two-story house.
首付款
Down payment.
电荷数为−1/3的最轻夸克
The lightest quark with a charge number of −1⁄3.
The pillow is filled with goose down, making it very soft.
这个枕头填充了鹅绒，所以非常柔软。
用法提示：此处down作名词，意为柔软的细羽毛，指填充物。
AI contextual example
She prefers a down comforter because it is light and warm.
她更喜欢羽绒被，因为它又轻又暖和。
用法提示：down作名词修饰comforter，表示羽绒填充的。
AI contextual example
Many sleeping bags are insulated with synthetic down for outdoor use.
许多睡袋使用合成绒进行保温，适合户外使用。
用法提示：down作名词，指代羽绒填充材料。
AI contextual example
down 在此义项下为不可数名词，常与物质名词连用作定语。
This jacket is filled with goose down.
这件夹克填充了鹅绒。
down 在此义项下为可数名词，常与序数词连用表示橄榄球比赛的档数。
The team needs a first down to keep the drive alive.
球队需要一次首攻来保持攻势。
同down一样指柔软细小的羽毛，但fluff更常用于描述蓬松的质地，而down特指鸭绒等。
fuzz更强调短而细的纤维或毛发，与down不完全等同。
用于 down 表示“不利方面、缺点”这一名词义，指事物积极、有利的一面，两者常成对出现。
与 down（缺点、不利之处）相对，指带来的好处或有利因素；语气比 upside 更强调具体优势。
指某事物带来的正面收益，与 down 所指的消极面相对，多用于较正式的语境。
口语中常与 down 的“缺点”义相对，如 pros and cons 中的 plus 与 minus 搭配。
down 指鸟类贴近皮肤、细软蓬松的绒羽（羽绒），常做保暖填充物；feather 指覆盖鸟身的普通羽毛，有羽轴和羽片，较硬挺。所以 down jacket 是'羽绒服'，而泛指鸟身上掉落的羽毛一般用 feather。
down 作名词表示'不好的一面'时，常与 up 对应，出现于 ups and downs 这类说法；downside 则是表达'某事物的缺点/不利方面'的常用名词，通常用 the downside of... 结构。要指具体某个选择或情况的负面时选 downside。
down 的读音是/daʊn/（'啊乌'），dawn 的读音是/dɔːn/（'奥'），且只有一个字母之差。记住：down（名词'羽绒/不利方面'）与方向或状态相关，dawn（名词'黎明'）只表示天刚亮的时候。
鹅绒
This sleeping bag is filled with goose down.
这个睡袋填充的是鹅绒。
羽绒服；羽绒夹克
She wore a down jacket in the cold weather.
她在寒冷的天气里穿了一件羽绒服。
羽绒被
I bought a down comforter for the winter.
我买了一条羽绒被过冬。
起起落落；兴衰
Every relationship has its ups and downs.
每段关系都有起起落落。
（橄榄球的）首次进攻；一档
The quarterback completed a pass for a first down.
四分卫完成了一次传球，取得了首攻。
羽绒是鸟类体表细软的羽毛，与羽毛属于同一语义场。
羽绒被通常以羽绒作为填充物，与羽绒密切相关。
部分枕头使用羽绒填充，同属寝具类词汇。
羽绒常作为夹克等衣物的保暖填充材料。
睡袋常以羽绒填充以达到保温效果，与羽绒同属户外保暖语义场。
起起落落；沉浮（生活中的興衰和順境逆境）
They have had their ups and downs, but their marriage is still strong.
他们的婚姻经历过起起落落，但依然牢固。
情绪低落的；闷闷不乐的
He's been down in the dumps since he lost his job.
自从失业以来，他一直闷闷不乐。
脚踏实地的；务实的
She's a down-to-earth person who doesn't like fancy things.
她是个脚踏实地的人，不喜欢花哨的东西。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY, WORDNET.