While most pregnant women face moderate stress, a smaller slicehave unrelenting, chronic strain.

大部分孕妇面临中等强度的压力，不过也有少部分人有着长期未疏解的压力。

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Does not have outside the model the wound waist chronic muscle damage, is called the waist strain.

无典型外伤口的腰部慢性筋肉损伤，称为腰部劳损。

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Objectives: To research the efficacy of exercise therapy, alternate ice and hot therapy and low power laser therapy on chronic lumbar muscle strain.

试验目的：探明运动疗法、冷热交替疗法和低强度激光照射疗法对腰肌劳损的疗效。

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Lack speculates that the differences found in the study between men and women may be even greater than the numbers show, since some women who were asked to participate declined -- ironically, because the chronic strain of their daily demands prevented them from doing so.

CNN: Society's stresses: Cause for depression in women