手掌上皮肤的纹理lines on one's palm(plural)

• 手诊是指通过观察掌纹、掌色、掌形的变化诊断疾病的一种方法。

  Hand diagnosis is a way of diagnosing illnesses through observing changes in the lines, complexion, and shape of one's palm.

• 看掌纹没有男左女右之说。

  There is no theory that one should look at the left hand for men and the right hand for women when reading the lines on one's palm.