A major reason for this rising is thermal expansion.

海平面上升的其中一个主要原因是热膨胀。

We talked about thermal expansion, including linear and volume expansion.

我们也谈到了热膨胀 纵向膨胀和体积膨胀。

And when the temperature of an object changes, it can undergo what’s known as thermal expansion.

当物体的温度发生变化时， 它会经历所谓的热膨胀。

This, combined with the thermal expansion of seawater as it warms, results in the sea levels creeping up.

再加上海水变暖时的热膨胀，导致海平面上升。

And when the temperature of an object changes, it can undergo what's known as thermal expansion.

当任何物质的温度发生变化时， 暴露于所谓的热膨胀。

It has what's called a high coefficient of thermal expansion, which means that when you heat it up a little, it expands a lot.

它具有所谓的高热膨胀系数，这意味着当你稍微加热它时，它会膨胀很多。

It has also very low thermal expansion, so expansion and contraction are minimized, reducing the thermal stress in the aircraft.

它还具有非常低的热膨胀，因此膨胀和收缩最小化，从而减少了飞机中的热应力。

And the fact that it was always on reduced the thermal cycling of the filament and components limiting the stress caused by thermal expansion and contraction.

而且它始终处于开启状态可减少灯丝和组件的热循环，从而限制由热膨胀和收缩引起的应力。