While prophylactic is used for birth control, but here it helps the culturists to make more illegal profit, by stimulating eels to grow bigger or to keep cucumbers fresh.

• 而避孕药本来是用于计生的，在这里却帮助种植者赢取更多的非法利润，通过刺激黄鳝长得更大或保持黄瓜新鲜。