引力算是负能量，当然星星的质量毫无疑问是正的。
Gravity accounts for negative energy, whereas the mass of a star is undeniably positive.
引力透镜现象就是光被巨大质量物体弯曲的现象。
A gravitational lens is formed when light is bent by a massive object.
引力的力量的大小，取决于物体的质量，或物质的总量。
Gravity's strength depends on an object's mass, or amount of matter.
引力的拉力取决于物体的大小，或者更确切地说，取决于质量。
The pull of gravity depends upon size, or, more accurate ly, upon mass.
质量越大，引力越强。
竞争帮助它提高了质量和吸引力。
宜家产品对愿意为质量花多一点钱的中国消费者具有吸引力。
Its products appeal to Chinese consumers willing to spend a bit more for quality.
在地球引力下，重量和质量是等值的，但是度量单位不同。
In the Earth's gravity, weight and is equivalent in quality, but different metric units.
我们产品的优势是设计有吸引力，质量高，价格合理。
The advantages of our products are attractive design, high quality and reasonable prices.
“最后，一千三百九十九美元是一个非常有吸引力的价格为投影机本的质量和多功能性”。
Finally, $1,399 is a very attractive price for a projector of this quality and versatility.
结果表明：引力场度规与点质量引起的相似。
The results show that the metric is similar to that caused by a point mass.
结果表明：引力场度规与点质量引起的相似。
The results show that the metric is similar to that caused by a point mass.
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