这通常只发生在,它们互相平行的时候。
And, the way in which that happens is if they are actually parallel to each other.
让你的第二个脚趾互相平行。
你的第二个脚趾应该指向前并互相平行。
Your second toes should be pointing forward and be parallel.
食指互相平行，或者轻微转向外，并转脚趾向下。
Spread your palms, index fingers parallel or slightly turned out, and turn your toes under.
在斜齿轮情况下，并且，旋转的轴不是互相平行的。
And in the case of bevel gears, the rotational axes are not parallel to each other.
支撑块2起支撑作用，以使热交换板3的面与面之间以一定的间距互相平行。
The supporting blocks 2 have a supporting function, so that the surfaces of the heat exchange plates 3 are parallel mutually in a certain distance.
三个T型关节模块的转轴互相平行，并与两端的I型关节模块的转轴互相垂直。
The rotating shafts of three t type joint modules are parallel to each other and are mutually perpendicular to the rotating shafts of the I type joint modules at both ends.
在研究四波耦合时，分别讨论了在三种BSO晶体切面上，信号光和向前泵浦光的的偏偏振振态态互相平行和存在夹角时相位共轭反射率的特性；
Studying four-wave mixing, we get the phase-conjugate reflectivity in three cut planes in BSO when the polarization of signal beam and pump beam are parallel or not parallel.
在平行的或者整合的层面中，地层好象书页一般互相重迭。
In parallel or concordant bedding the strata overlay each other like pages of a book.
最后只能站在两条平行线上互相守望却从不曾交错！
Can stand finally at two parallel on-line mutual on guard never once cross however!
最后只能站在两条平行线上互相守望却从不曾交错！
Can stand finally at two parallel on-line mutual on guard never once cross however!
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