You should not deliberately firm your abdomen, although it does retain a degree of firmness naturally from the uplifting action in your torso.
你不能使腹部僵硬，尽管腹部在躯干向上时要保持一定程度的自然收紧。
Examine the firmness and color of fresh pears. Being firm to touch is one of the many indicators of freshness.
查看梨的硬度和颜色。摸起来硬说明它可能是新鲜的。
Firmness of jam berries correlated negatively with firmness of jam media, i. e. jams with firmer strawberries had less firm medium.
浆果果酱果酱硬度与媒体相关的坚定性负，即以更坚定的草莓果酱少了坚定的媒介。
Regular use improves elasticity and firmness, reducing the appearance of fine lines and age spots, so skin looks firm and radiant.
定期使用，可改善肌肤弹性，变得更加紧致，并淡化幼纹和色斑，令肌肤光采再现。
Maintain skin firmness, strengthen skin resistance, make skin smooth, firm, tender and bright.
维持肌肤弹性和紧致，增强肌肤的抵抗力，令肌肤平滑有弹性，焕发娇嫩光彩。
Maintain skin firmness, strengthen skin resistance, make skin smooth, firm, tender and bright.
维持肌肤弹性和紧致，增强肌肤的抵抗力，令肌肤平滑有弹性，焕发娇嫩光彩。
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