The elastic recovery following compression is quite good and allows for a long flex life expectancy in applications such as this.

压缩后的弹性复原非常理想，在此类应用中使用寿命长。

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The cable is soft, elastic, flex index and won't harden in low temperature.

该电缆：柔软，有弹性，耐弯曲，低温状态下不发硬。

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The Flex E are manufactured in polyurethane with a semi-elastic tension member.

半弹性多楔带用半弹性带芯与聚氨酯制成。

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Strength training can involve a number of approaches including using free weights, such as dumbbells or barbells, resistance or elastic bands that allow you to flex using your arms and legs, as well as ankle weights or vests and other special exercises that use your body weight to simulate resistance against gravity.

FORBES: Why Strength Training May Help You Live Longer