n.

1. 先鋒；前鋒；先頭部隊；先導[the S][G]
   They are in the vanguard of technological advance.

   他們是技術發展的先導。

n.

1. the foremost part of an advancing army or naval force.
2. a group of people leading the way in new developments or ideas.
   ▸a position at the forefront of developments or ideas.