1. down under : 在/向地球另一边；
副词
1. Down in the valley the fog still lingers.
下面山谷里仍然雾气蒙蒙。
2. You must pay $10 down.
你必须付10美元现金。
形容词
1. Dick is feeling a bit down today.
狄克今天有点情绪低落。
指路
A：Could you tell me where (his office/ the meeting room/ the copy machine) is, please?
你能告诉我（他的办公室/会议室/复印机）在哪里吗？
B：Sure. It’s just down the hall, on the right.
当然。沿着这个厅走过去，在右边。
Swimming-(游泳)
A：How about going swimming？
去游泳怎么样？
B：OK. Where should we go?
好，我们到哪去？
A：Why don't we go down to the pool? It's not too far from here.
去游泳池吧。离这里不是太远
B：Fine. I'll be ready in a minute.
好的，我马上准备去。
生活对话
B：You're kind of down these days.
你最近看起来心情不好。
A：I'm OK.
我还好。
B：Sure? Boy problems?
真的吗？是跟男生有关的事吗？
A：No, I'm fine.
不，我很好。
B：Are you busy on the 30th?
你三十号那天有事吗？
A：No.
没事。
B：Well then, let's go to an outdoor symphony concert. My treat!
那么，我们去一个户外的交响乐演奏会。我请客！
1. 羽绒：最近一些服裝設計師,也開始將羽絨(DOWN)填充應用在流行服飾上,讓羽絨衣以更多樣化的風貌呈現在消費者面前,更貼近我們的日常穿著,改變了消費者認為羽絨衣只有在出國賞雪、登山旅遊才能穿用的刻板
2. 下移：按住上移(UP)或下移(DOWN)键,浏览操作屏幕左侧的文件夹列表. 2、选中所需文件夹,按确认(ENTER)键. 3、按住上移(UP)或下移(DOWN)键浏览歌曲列表并选中所需歌曲. 按确认(ENTER)键,开始回放选中的歌曲. 可在光盘上临时选定歌曲播放顺序.
3. 减少：预载荷的调节由计算机控制位于骑手膝盖附近的液压油缸入行;骑手除了可以非常方便地采用按钮设置减震器的软硬程度,亦即任意增加(UP)或减少(DOWN)预载荷外.
介词和副词用法（PREPOSITION AND ADVERB USES）
Down is often used with verbs of movement, such as ‘fall’ and ‘pull’, and also in phrasal verbs such as ‘bring down’ and ‘calm down’.noun
1. (American football) a complete play to advance the football
e.g. you have four downs to gain ten yards
2. soft fine feathers
Synonym: down feather
3. fine soft dense hair (as the fine short hair of cattle or deer or the wool of sheep or the undercoat of certain dogs)
Synonym: pile
4. (usually plural) a rolling treeless highland with little soil