dawn’s produce 92 millinewtons of thrust, something like a fiftieth of the amount in a smallish firework rocket.
「黎明」号产生的推进力仅为0.092牛顿,是小型烟花火箭推进力的五十分之一。
second, i didn't understand a fiftieth of what he was talking about.
第二,他说的这么多话我基本一句听不懂。
for instance, sirius b is roughly the same mass as the sun, but is 90,000 times as dense, and so is only a fiftieth its diameter.
例如,天狼星b的质量与太阳相当,但比太阳致密9万倍,所以只有太阳直径的1/50。