This paper presents a basic law of the simplified equation of surface of degree 2, especially the law of the simplified equation of surface of degree 2 with two equal zero roots.

给出一种简便的二次曲面简化方程的基本定理，特别给出二重零特征根二次曲面简化方程的定理。

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Even though one or two degree Celsius rise in sea surface temperature for a relatively short amount of time can cause bleaching.

即使海面温度在短时间内升高一到两摄氏度，也可能会引起褪色。

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However, if you scrape beneath the surface of many of these pledges, you will discover a high degree of imprecision and conditionality that could be expected from a series of unilateral declarations.

然而，如果你揭开这些承诺的表皮，你会发现里面有高度的不明确性和前提条件，这些估计在以后的单边声明中都会一一逐步地提出来。

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It is actually a completely mainstream view that doubling carbon dioxide, ipso facto, will only result in a net surface warming of about 1 degree (C).

FORBES: What Happens When You Rub Two Climatologists Together?

The boy's chin and lip were bruised and his lip cut inside, which in the doctor's opinion were caused by his chin forcefully striking a hard surface that, because of the degree of force, caused the bleeding to the brain.

BBC: Thomas Poole jailed for 30 months for assaulting toddler

In addition to mastery of traditional calligraphy, the art of engraving requires a high degree of virtuosity, since the artist works on a tiny surface area where every curve, every thickness of line counts.

UNESCO: Culture