aboard: 在船(或飞机,车)上。如:I never went aboard a ship.
broad: 为形容词,宽广的。如:He has very broad shoulders.
abroad: 副词,在国外或海外。如:He often goes abroad.
board: 为动词,上(船,飞机,车)。如:The passengers are boarding the plane now.
这组词都有“技术”的意思,其区别是:
technique: 多指具体的某种技术和技巧。
technology: 含义比technique广泛,泛指生产工艺、科学技术。