disturb  vt. 打扰，扰乱，使不安
[特征]
- Don't disturb me while I'm reading.
当我看书时不要打扰我。
- The news that my brother was fired has disturbed me very much.
我哥哥被解雇的消息使我很不安。
[贴心叮咛]
disturb的意思是打断或破坏原有的安宁、安定的状态，也可指让别人的心绪不安宁。
[备考必背] 重要句型
be disturbed of/about ...  因……感到心神不安
be disturbed to see/hear ... 看到/听到……感到不安
- I was disturbed about the bad news.
对于这坏消息，我感到心神不安。
- I was disturbed to hear the bad news.
听到这坏消息我感到很不安。

dive  vi. 潜水；跳水；俯冲  n. 跳水
[特征]
- Dare you dive from the high bridge?
你敢从这座高桥尚跳下去吗？
- What a beautiful dive!
多么优美的跳水呀！
[备考必背] 重要词组
dive into 跳进   make a dive for 向……冲去
- The soldier made a dive for the ditch.
这名战士向壕沟冲去。

divide  v. 分开；分割
[特征]
- The teacher divided the students into four groups.
老师把学生分成了四个小组。
- Fifteen divided by three is five.
3 除15等于5。
[备考必背]
①重要词组
divide ... into ... 把……分成……     divide up 分配
- We divided up the money equally.
我们将钱分平了。
divide ... from ... 把……从……中分出来
- We should divide the patients from the others.
我们应该对病人进行隔离。
②辨析divide和separate
两者都表示“分”。divide指将整体分成若干份；separate指把原来在一起的人或物分离开。
- Let's divide the cake into three.
让我们将蛋糕分成三份。
- We must find a way to separate oil from its mixture.
我们必须想个法子把油从它的混合物中分离出来。
③派生词：division  n. 分开，分割
- This group division is unreasonable.
这样的分组不合理。

dot  n. 点，圆点  vt.在……上打点
[特征]
a dotted line 一条虚线
- I have a white shirt with blue dots.
我有一件带蓝点的白衬衫。
- On the map, towns were marked by red dots.
在地图上，城镇是用小红点标出的。
- The ship became a mere dot on the horizon.
船在远处的水平线上成了一个小点。
- Why didn't you dot I?
你为什么不在I上加点呢？