The supplied paddle is made of beryllium copper and superior to stainless steel in the area of flex memory, tensile strength and corrosion resistance.

所提供的开关叶片采用铍铜合金制造，铍铜合金在弯曲记忆区域、抗张强度和耐腐蚀等指标均优于不锈钢。

youdao

It has a better flex cracking resistance than those of natural rubber but a lower tear strength and a higher dynamic modulus.

它比天然橡胶具有较好的抗挠曲开裂性能，但撕裂强度较低，动态模量较高。

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It has good physical properties, including high tensile strength, abrasion resistance, at high temperatures good dynamic behavior and flex cracking resistance at elevated temperatures.

HNBR具有非常优越的物理性能，包括高的抗拉伸强度，抗撕裂，高温动态使用和逐递上升温度中的抗屈挠防裂性能。

youdao

Despite this H20 resistance, the Flex won't track your butterfly strokes (or doggie paddles), but it will keep count of your steps, calories burned, sleep and distance walked.

ENGADGET

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