knack

n.

诀窍，窍门；熟练技术，技巧；需要技巧的工作；巧妙手法

复数：knacks

1. There is a knack in tying ropes together.
   把绳子绑在一起有点技巧。
2. He has a knack of teaching mathematics.
   他教数学有点技巧。
3. There's a knack in/to locking this door which takes a while to master.
   锁这门要有窍门，得用些时间才能学会。
4. She has a knack of making friends.
   她有一套交朋友的诀窍。

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