The three wires were fed from the three spools and wound as one wire; thus comprising the trifilar terminology.

三条从三个轴成一条，从而符合三并要求。

When the circuitry takes the form of two or three wires running in parallel, the magnetic field forms a tubelike trap along which the atoms can move freely.

当路中有二或三条导排列时，磁场会形成管状阱，原子可在其中自由移动。