**以下不一定完全正确的答案,主要看平行来做**
NOUN + for + VERBing:
In this construction, the VERBing action = the SOLE PURPOSE of the modified noun.
Correct: Company X manufacturers a camera for photographing killer whales.
Conveyed meaning:
The portion in blue = the sole purpose of the camera.
Incorrect: Company X manufacturers a camera for photographing the new killer whales that will be on display at the aquarium next week.
An OA with NOUN + for + VERBing:
Astronomers have developed a scale for rating the likelihood that a particular asteroid will collide with earth.