vt.

1. 扎牢；系紧；闩住；钉牢[（+up/together）]
   The little boy has learnt to fasten shoelaces.

   这小男孩已学会系鞋带了。

2. 把（目光、注意等）集中于[（+on/upon）]
   The old lady fastened her eyes on the stranger.

   老太太始终注视着那个陌生人。

3. 把（绰号、罪名等）强加于[（+on/upon）]
   It was wrong of you to fasten the blame on him.

   你把过错推到他头上是不对的。

vi.

1. 扣紧；闩住
   The door won't fasten.

   门闩不上。

2. 集中注意力，全神贯注[（+on/upon）]
   Fasten on what the teacher is saying.

   注意听老师说。

3. 抓住；盯住不放地攻击[（+on/onto/upon）]
   There is no sense in fastening on that pretext of yours.

   一味强调你那个借口是没有用处的。

v.

1. close or do up securely.
   ▸fix or hold in place.
   ▸ (fasten something off) secure the end of a thread with stitches or a knot.
2. (fasten on/upon) single out (something) and concentrate firmly on it.