1. Eight is the double of four. 8
   是4的两倍。
2. Ten is the double of five.
   十是五的两倍。
3. The dog doubled on its tracks .
   狗急忙折回逃跑。
4. The fox doubled (back) on its tracks.
   狐狸突然转身急逃。
5. The wounded tigress was now roaring double tides.
   那只受伤的母老虎正在怒吼。
6. The baby doubled its weight in a year.
   那婴儿一年中体重增加了一倍。
7. A double salt of platinous cyanide and another cyanide.
   由于氰化铁氧化而形成的氰铁酸的盐。
8. Compared with diolefine rubber,EPDM has less double bond.
   与二烯烃橡胶相比,EPDM的双键很少。
9. Tony glanced at her, then did a double take .
   托尼瞥了她一眼，过后才恍然大悟。
10. This pneumatic tool will double the speed of assembly.
    这个气动工具可以把装配速度提高一倍。
11. He suddenly doubled and ran in the opposite direction.
    他突然转身, 朝相反方向跑去。
12. They all doubled up when I told my joke.
    当我讲笑话时, 他们都笑得直不起身子来。
13. He doubled as coach and captain of the team.
    他担任教练兼队长。
14. The total output is double that of last year.
    总产量是去年的两倍。
15. She paired off with Alice in a tennis doubles match.
    她在网球双打比赛中与阿莉斯结成一对。
16. The house has doubled in value since I bought it.
    自从我买下这幢房子以来, 它的价值已增加了一倍。
17. Proposes pictureencryption algorithm based on the double unidimensional chaos system.
    摘要 提出了一个基于双一维混沌系统的图像加密算法。
18. Field cancerization was the base of double primary lung cancer.
    区域性癌化是双原发性肺癌发生的病理基础。
19. He is doubling the parts of a preacher and a teacher.
    他扮演牧师和教师两个角色。
20. He is doubling the part of a teacher and a missioner.
    他在一出戏里扮演教师和传教士两个角色。

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