Guarding in the left lower quadrant.

左下腹肌卫。

There's pain in his lower quadrant.

他的下腹疼痛。

As more damage is done to the tissue, patients experience pain in the left lower quadrant, which corresponds to the rectum.

随着组织损伤加重，患者会感到左下腹疼痛，这个位置对应的是腹腔内的直肠。

There! Right there. A hematoma. in the right lower quadrant.

那儿 就在那儿 一个血肿。低四分区的右边。

As more gastrointestinal tissue is damaged, patients might experience pain in the affected areas, most commonly in the right lower quadrant which is associated with the ileum.

随着胃肠道组织损伤的加重，患者可能会在受损区域感到疼痛，最常见于右下腹，是回肠的体表投射部位。

If it's negative in lead I and positive in aVF, the axis is running away from lead I but toward aVF and is thus in the lower right quadrant.

如果I导联为负，aVF为正，则轴从导联I向aVF移动，因此位于右下象限。