一个沉重的背包迫使肌肉和脊椎来平衡那些不均的重量。
A heavy backpack forces the muscles and spine to balance the unequal weight.
你也可以因其他原因获得更多的重量，如增加肌肉，但是你得积极一些，沉重的训练及多吃。
You can also gain more weight for other reasons such as increased muscle, but you would need to be doing progressive, heavy resistance training and eating more calories over time.
一般来说，眼周肌肉包括上睑提肌的沉重，和全身其他肌肉的疲劳类似。
Generally speaking, heaviness of the muscles around the eyes, including the levator muscles that open the upper eyelids, is similar to fatigue of any muscle of the body.
比如，举一个沉重的物体，当举重物时扭腰，摔倒，或一些运动可引起腰部肌肉扭伤。
For example, lifting a heavy object, twisting while lifting, falling, or some sports could cause lumbar muscle strain.
他感到非常疲惫，不可想象的沉重，肌肉尤其是手臂部分经常感到疼痛，也没有规律的睡眠时间。
He had the feeling of being very tired, of having incredibly heavy, aching muscles, especially in the arms, and his sleep patterns were erratic.
他是一个巨大的男子约5'6“高，有一个非常沉重的骨骼肌肉的附件显示为巨大的。”
He was a massive man at about 5 '6 "tall with an extremely heavy skeleton that showed attachments for massive muscles."
大腿肌肉沉重，且从后面观察时，后躯圆而宽。
The thighs are heavily muscled and, when viewed from behind, the rear is round and broad.
大腿肌肉沉重，且从后面观察时，后躯圆而宽。
The thighs are heavily muscled and, when viewed from behind, the rear is round and broad.
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