通常将手的前面称为掌面或手掌，脚的下面称为跖面或足底。
Usually the anterior surface of the hand is called the volar or palmar surface and the inferior surface of the foot is called the plantar surface or sole.
要准确计算手指长度，就必须测手指掌面最低折痕中点到肉的尖端尾部之间的距离。
To calculate finger length accurately you must measure the distance from the midpoint of the lowest crease at the base of the finger on the palm side to the very end of the fleshy tip.
另一方面，通常只有服务于知名企业和大学的专家才掌有此类信息。
On the other hand, such information is usually at the hands of experts (专家) who serve well-known companies and universities.
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