位置在低处的used to indicate a low position

• 下嘴唇

  lower lip

• 山下

  at the foot of the mountain

• 窗下

  under the window

• 在灯下看书

  read under the lamp

• 站在树下

  stand under the tree

• 住在楼下

  live downstairs

• 脸朝下

  face downward

• 从上往下看

  look from top to bottom

次序或时间在后的used to indicate something comes later in a sequence or occurs at a later time

• 下届

  next session

• 下一部分

  next part

• 下星期三

  next Wednesday

• 下一个月

  next month

• 下半年

  second half of the year

• 下一站

  next stop

• 下一步

  next step

• 下一代

  next generation

• 下一个是谁?

  Who's next?

在一定的范围、情况、条件内used to indicate a specific circumstance, condition, or situation

• 在艰苦的条件下

  under difficult conditions

• 在这种情况下

  in these circumstances

表示方面或方向used to indicate position or direction

• 往四下里一看

  looking quickly to all sides

• 两下里都同意

  both sides agree

表示当某个时节used to indicate a specific time period

• 年下

  lunar new year

• 节下

  on or near a festival

等次或品级低的used to indicate a lower rank or grade

用于动作次数used to indicate the number of times an action is performed

• 钟打了两下。

  The clock struck twice.

• 让我再看一下。

  Let me take another look.

用在“两、几”后面，表示本领、技能used after liang and ji to indicate skill or ability

• 他真有两下。

  He knows a thing or two.

• 我看你就这么几下。

  I can see that's all you've got.

由高到低to go from high to low

• 下山

  descend a mountain

• 下楼梯

  descend the stairs

• 下楼

  go downstairs

• 下火车

  get off a train

• 下轮船

  disembark from a ferry

• 下矿井

  go down a mine

• 顺流而下

  float downstream

降落to fall

• 下露水

  to drip dew

• 下雾

  to be foggy

• 下毛毛雨

  to drizzle

• 外面在下雨。

  It's raining outside.

• 昨天下过雷雨。

  Yesterday there was a thunderstorm.

• 只下了几滴雨就停了。

  It stopped raining after a few drops.

• 正月里才下雪。

  It won't rain till the first month of the lunar year.

颁发；投递to issue; to deliver

• 下命令

  give an order

• 下通知

  notify

• 下条子

  give a note

进入to enter

• 下车间

  go to the workshop

退场to leave

• 从舞台的右边下

  exit the stage to the right

放入to put in

• 下本钱

  invest

• 下锚

  to anchor

• 下面条

  put noodles in

• 米下了锅。

  The rice is in the pan.

卸除，取下to take away

• 下帆

  lower a sail

• 下货

  unload goods

• 把窗户下下来

  take down the window

• 把俘虏的枪下了

  disarm the prisoners

作出to make

• 下决心

  make a resolution

• 下结论

  reach a conclusion

• 下批语

  make a comment

• 下定义

  define

• 下注解

  annotate

使用to make use of

• 下力气

  exert oneself

• 下毒药

  poison

动物生产；禽、虫、鱼产卵to give birth; to lay an egg

• 母鸡下蛋。

  The hen lays an egg.

• 下小猪

  give birth to a piglet

• 下小牛

  give birth to a calf

攻陷to capture

• 我军连下数城。

  Our army captured several cities in succession.

退让to give in

• 相持不下。

  To be locked in stalemate.

少于to be less than

• 不下三千人

  be no less than three thousand people

按时结束工作、学习to finish on time

低于to be lower than

• 零下二度

  be two degrees below zero

进行to commence

• 下象棋

  play chess

• 他们下了一晚上象棋。

  They played chess all evening.

向下面to go lower

• 江河日下

  be on the decline; rivers flow further downhill each day(literal)