1. a drawback or difficulty that is not readily evident;

   "it sounds good but what's the catch?"
   

2. something unspecified whose name is either forgotten or not known;

   "she eased the ball-shaped doodad back into its socket"
   "there may be some great new gizmo around the corner that you will want to use"
   

3. any clever maneuver;

   "he would stoop to any device to win a point"
   "it was a great sales gimmick"
   "a cheap promotions gimmick for greedy businessmen"
   

1.（引人注意或关注的）噱头，花招
Agimmick is an unusual and unnecessary feature or action whose purpose is to attract attention or publicity.

e.g. It is just a public relationsgimmick...
这只不过是一种公关伎俩。
e.g. The exhibition is informative, up to date, and mercifully free of gimmicks.
这个展览既能让人增长见识，又紧跟时代前沿，而且幸运的是没有华而不实的东西。

1.

1. 机关：当年 unifive 个只, 我见过five fish, 最后都决定唔买, 因为嫌佢d机关 (gimmick) 太少儿科,

2. (魔术师道具等)暗机关：4. taffeta 花花绿绿的塔夫绸,衬绸 | 5.gimmick (魔术师道具等)暗机关, | 6. garish 装饰(物) 鲜艳夺目的,俗不可耐的

3. 骗局;绞合电容器：gimlet 手钻;锥子 |gimmick 骗局;绞合电容器 | gin pole 安装用起重架;安装拔杆;起重拔杆;储罐支柱

4. 暗机关：gimmal 双连环 |gimmick 暗机关 |gimmickery 巧妙的装置