When the pipe joint screw, should follow the principle of diagonal twist, not one by one in order to operate, do not screw the screw die, so that the correct installation of rubber gasket.
在拧管道接头螺丝时，应遵循对角互拧的原则，不要逐个顺序进行操作，不要一次性将螺丝拧死，这样才能将橡胶垫片正确地安装上去。
Researchers now report just such a discovery: the joint of a beetle leg that turns inward and outward like a screw.
现在，研究人员正是关于这样一个发现做出报告：甲虫肢体关节内外旋转和螺丝的原理异曲同工。
It's much harder, they say, to dislocate a screw than a round-ball-and-socket joint.
这种螺纹状的关节与球状关节相比，更难发生脱臼的情况。
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