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n.九头蛇；[无脊椎]水螅；难以根除之祸害
1、vital hydra───活水螅
2、soothing hydra───舒缓九头蛇
3、hydra 5e───海德拉5e
4、hydra tf───海德拉tf
5、hydra constellation───九头蛇星座
6、hydra sublim───水螅升华
7、hydra bed───水螅床
8、hydra b───水螅b
9、hail hydra───九头蛇万岁（表示对组织或者首领的忠诚）
1、Hydra IRC, an open source chat client, is quickly gaining a stellar reputation.───Hydra IRC是一个开源聊天客户端，但它迅速获得了辉煌的声誉。
2、He was as motionless as a corpse, while his thoughts wallowed on the earth and soared, now like the hydra, now like the eagle.───一动不动，就象死尸一样，这时，他的SiChao在地下打滚又腾空，有时象七头蛇，有时象鹰鹫。
3、Stony coral skeleton of a goblet, the body that surround the Hydra, its composition almost solely for calcium carbonate.───石珊瑚的骨骼呈杯状，包住水螅体，其成分几乎纯为碳酸钙。
4、COMPARED with the hydra-headed fight against terror, the cold war seems to have been deceptively easy.───相比于错综复杂的“反恐”战争而言，冷战看起来似乎更令人容易理解。
5、An asexual reproductive structure, as in yeast or a hydra, that consists of an outgrowth capable of developing into a new individual.───一种无性再生结构，如酵母或水螅，包含有一个外部生长物，可以发育成一个新的个体。
6、Adobe labs describes Hydra as a, “high-performance image processing language.”───Adobe Labs对Hydra语言的描述是一门“高性能图像处理语言”。
7、He stands there panting, just out of range of the hydra heads.───他站在蛇树的头部的袭击范围外直喘气。
8、Hydra can connect to as many servers on as many different networks as you wish and is able to maintain multiple user identities.───Hydra可以连接到任意多网络上的任意多服务器，它还可以维护多重用户身份。
9、The Cyclops , Apollo's chariot? and now hydra heads! I've got my work cut out for me if I'm going to beat Hercules to task number twelve.───独眼巨人，阿波罗战车？现在是九头蛇怪！我自己的工作被取代了，假如我还打算去击败大力英雄来达成十二项任务。
1、Hydra selected the step ladder/handtruck.
2、Eventually the High Masters of the Ordo Hydra would activate those psychic spores.
3、Would the hydra eventually wither away spontaneously?
4、And Jaq would spread the hydra far and wide.
5、I am declaring general emergency codes Bandersnatch and Hydra.
6、Unlike hydra, they have clearly defined head and tail ends, and a much more elaborate behavioural repertoire.
7、Hydra - Increased base speed of Hydra projectile.
8、How many hydra per cubic centimetre teem in that pond?
9、But the regenerative powers of the corporate hydra were insidious.