表面最高温度接近熔化温度时，仍含有一定数量的未溶渗碳体。

But at the peak temperature near the temperatures of melting, a significant amount of undissolved carbides still exist in the surface.

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在凝固准稳态阶段，熔池熔深和半径变化较小，但表面最高温度、熔池流速急剧减小；凝固加速阶段则反之。

At quasi - state stage, the depth and radius of laser pool have small changes, but the highest surface temperature and velocity of molten pool decease rapidly.

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四者中拥有最高温度的是金星，而原因很简单——由于有稠密的大气层，金星从太阳吸收的热量无法“逃”到太空中，它的表面温度高达500摄氏度——足以使铅熔化。

Due to its dense atmosphere, heat that reaches Venus from the sun can't escape into space. Surface temperatures can reach around 500 degrees Celsius -- hot enough to melt lead!

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