“气球”宇宙飞船使用水力向太空推进，成本大约是普通宇宙飞船的三十分之一。
The "Balloon" spaceship uses water to push it through space and costs about one-thirtieth of a normal spaceship.
木星的光照程度只有地球的三十分之一，土星为八十分之一，天王星甚至达到三百分之一，而离太阳最远的那些星体，如1845年发现的海王星，光照程度只有地球的九百分之一。
On Saturn, eighty times. On Uranus, even three hundred times; and upon the last of the planets, Neptune, discovered in 1845, light is nine hundred times more feeble than upon our globe.
一弧秒的移动是一毫米的三十分之一。
One second of arc movement is one thirtieth of a millimetre.
往往，农民所得到的土地补偿费不及土地出让费的十分之一，一般仅有三十分之一左右。
The compensation given to farmers was usually less than ten percent, on average around thirty percent, of the land transfer charges.
总之，地热能大约只拿到了联邦总资助的三十分之一，资助包括：研究拨款、对等资金、税收减免，联邦的资助主要都用于风能和太阳能。
Overall, geothermal has received around a thirtieth of the federal support-in terms of research grants, matching funds and tax credits-that has been handed out to wind and solar.
一天大约是一个月的三十分之一。
一弧秒的移动是一毫米的三十分之一。
此属性的默认值等于图像的数量乘以三十分之一。
The default value of this property is equal to the number of images multiplied by 1/30th of a second.
此属性的默认值等于图像的数量乘以三十分之一。
The default value of this property is equal to the number of images multiplied by 1/30th of a second.
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