Textbooks, too, are becoming interactive, with 3-d clips of helixes.

配有3d视频的教科书也同样变成为互动模式。

Formed from a series of interlocking helixes it presented significant analytical and construction challenges .

它是由一系列带有重要分析意义和建筑挑战的联锁螺旋状物体组成。

However, the forming of the twelve helixes will be plenty to give you, as a species, a much bigger picture of who you are.

然而，作为一个族类，十二螺旋的形成，将极大地赋予你们是谁的更大的图片。

There are many helixes of dihedral Angle, and the whole skeleton forms a large helix in the structure of the rotatory isomer.

其结构中包含许多二面角螺旋，而且具有旋光性的异构体，其结构的整体骨架也构成一个大的螺旋。

The stability of these triple helixes is so high that homopyrimidine PNA targeted to purine tracts of dsDNA invades the duplex by displacing one of the DNA strands.

这种三螺旋体的稳定性极高，以至于在同型嘧啶PNA靶向双链DNA嘌呤道时，能取代其中一条DNA链侵入双螺旋。

Crick, who saw a photo only of Dr. Franklin's B form, immediately recognized that DNA consisted of two parallel helixes, or twisted chains, running in opposite directions.

克里克见过富兰克林的B型照片，立即发现DNA包含反向旋转的两个并列螺旋列或叫扭曲链。

The varying pitch helixes were constructed on the parameter equation, and were selected as sweep trajectory; the surface of the screw was enveloped on the generating method.

设计过程中按推导出的数学方程构造各段螺旋线，并以该螺旋线作为扫描轨迹，遵循范成法原理包络出螺杆的各段螺旋曲面。