Choose a weight or resistance level heavy enough to tire your muscles after about 12 repetitions.

选择一个合适的重量或阻力水平，在12组的重复训练后能够使您的肌肉感到极限。

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Because the water is very difficult to tire full, but it does not reduce body weight.

因为注水很难使轮胎十分饱满，而且也不能减轻车身重量。

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The technical team will have a hard time coming up with a solution to offset the issues contributed by this additional weight towards the brake, the suspension, the tire and the balance of the car.

车队的技术团队要全力以赴调整车辆，解决增加赛车重量所影响的刹车系统，悬挂系统，轮胎和车辆平衡性等一系列问题。

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