这些细小线材的抗拉伸能力是很差的，所以这一步必不可少。
Those tiny wires don't respond well to jolts so this is a MUST.
当皮肤无法承受过度的皮肤纤维达到其拉伸能力，妊娠纹的形式。
When the skin is incapable of withstanding overstretching as the skin fibres reach their tensile capacity, stretch marks form.
上头几节课时，乔安妮对于肚皮舞不要求舞者有惊人的肌肉拉伸能力或敏捷性这一实情感到很开心。
During her first lessons, Joanne loved the fact that belly dancing didn't require an incredible stretching power or 25 agility.
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