此前罗西试飞时的时间从未超过十分钟，所以在这次飞行前他必须将机翼和体重都调整到最佳状态，因为即便增加几百克的重量都会影响他的飞行。
Rossy had never flown for longer than ten minutes and had to calibrate his equipment and weight to perfection since even the addition of a few hundred grammes would have affected his flying ability.
“深海飞行2”号将用一个更强悍的锂聚合物电池取代重量，所以推进器能促使其下降，从而在水中更灵活。
Deep Flight II will ideally replace the weights with a stronger lithium-polymer battery, so its thrusters can propel it down, making it more nimble in the water.
按照动物学家基本计算方法，飞行动物佩带的发射器重量应当低于其本身体重的1/20。
The rule of thumb used by zoologists is that a transmitter worn by a flying animal should weigh no more than a twentieth of the weight of the individual wearing it.
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