人的手指和手掌面的皮肤上，存有大量的汗腺和皮脂腺，所以会不断地有汗液与

人的手指和手掌面的皮肤上，存有大量的汗腺和皮脂腺，所以会不断地有汗液与皮脂液排出。因此，只要手指、手掌接触到物体表面，就会自动留下印痕。

Results (English) 1:

Fingers and palms on the skin surface of the human, there a lot of sweat and sebaceous glands, so there will continue to sweat and sebum liquid discharge. Thus, as long as the finger, palm in contact with the surface of the object will automatically leave prints.

Results (English) 2:

. คณะกรรมการจากกระทรวงศึกษาธิการกำลังจะตรวจสอบโรงเรียน

Results (English) 3:

There are a large number of sweat glands and sebaceous glands on the skin of human fingers and palms, so sweat and sebaceous fluid will be continuously discharged. Therefore, as long as the fingers and palms touch the surface of the object, they will automatically leave traces.