... contrarotation 反向旋转 contrary sign 异号 contrary-turning propeller 对转推进器 ...
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结果指出，在紧靠裂纹顶端的滑移面上出现和裂纹位错异号的位错。
It is found that opposite sign dislocations appear on the slip plane immediately ahead of the crack tip.
1976人们对于异星生命的存在感到很悲观。 当年海盗一号飞行器登录火星，用它伸出的机械臂抓起了一掊红色的火星尘土并进行了化学测试。
Things were not looking so good for alien life in 1976, after the Viking I spacecraft landed on Mars, stretched out its robotic arm, and gathered up a fist-size pile of red dirt for chemical testing.
目的分析疑有染色体异常个体的9号染色体异染色质区的变异。
Objective:To analysis the aberration of chromosome 9 heterochromatin for persons suspected to have chromosome abnormalities.
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