n. 两倍a. 两倍的, 双重的vt. 使加倍vi. 加倍, 代替, 快步走【计】 双精度型【经】 两倍; 两倍的; 使...成两倍相关词组: on the double double up double back at the double

◆记忆方法一：
谐音：打包 打包要花两倍的时间。
◆记忆方法二：
词根词缀记忆法：double a 翻倍,du,dub,doub=two,表示“二，双”

• double 用法详解
  
  
  double 用法详解
  
  double可用作限定词、形容词、副词、动词等。下面是它用作不同词性时的不同用法：
  一、用作限定词的用法
  double用作限定词时，意为“两倍”，是前位限定词，其用法与其他前位限定词（如倍数词、分数词、以及 all, both, half等）的用法一样，不仅要放在所有形容词的前面，而且要放在中位限定词（如冠词、指示代词、物主代词等）和后位限定词（序数词、基数词等）之前。如：
  He got double the sum. 他得到了那个金额的两倍。
  They want at least double their salaries. 他们想至少要把工资提高一倍。
  Everything was almost double the normal price. 样样东西几乎都是平时价格的两倍。
  有时可放在 what从句之前。如：
  His income is double what it was five years ago. 他的收入是5年前的两倍。

trouble/bother/disturb/upset/brother/double/doubt
记忆：
1. trouble [ 5trQbl ] n. 烦恼, 麻烦, 疾病 vt. (使)烦恼, 麻烦, 打扰 We shall help those in trouble. 我们应该帮助那些有困难的人。
2. bother [ 5bCTE ] v. 麻烦, 烦扰, 打扰 Sorry to bother you. 对不起要打搅你了。
3. disturb [ dis5tE:b ] vt. 弄乱, 打乱, 打扰 Please don't disturb me while I'm working. 当我工作时，请不要打扰我。
4. upset [ Qp5set ] vt. 颠覆, 推翻, 扰乱, 使不适, 使心烦 The sad news made all the peace-loving people upset. 这条悲伤的消息使所有热爱和平的人非常不安。
5. brother [ 5brQTE ] n. 兄弟 Don’t bother your brother. He is preparing for the exam. 别打扰你的哥哥，他正在准备考试。
6. double [ 5dQbl] adj. 两倍的, 双重的 vt. 使加倍 It’s time to double our efforts to protect real human rights. 该我们加倍努力保护真正的人权了。
7. doubt [ daut ] n. & v. 怀疑, 疑惑 I never doubt his honesty. 我从未怀疑他的诚实。 格言：　 Doubt is the key of knowledge.怀疑是知识之钥。
另类阅读：
Don’t bother your brother! He has some trouble in working out his maths problem. He is doubling his efforts and shouldn’t be disturbed.

轻松一刻
The squad were having "visual training". One smart recruit was asked by the officer to count how many men composed a digging party in a distant field. The party was so far away that the men appeared as mere dots, but unhesitatingly the recruit replied:
"Sixteen men and a sergeant, sir."
"Right; but how do you know there's a sergeant there?"
"He's not doing any digging, sir."