You can bend and move your ear with your fingers but it will go back to its normal shape because of the cartilage inside.

即使用手指按压揉搓耳朵，它也能恢复原状，就是因为软骨的存在。

The binary system periodically brightens by a huge amount partly because the larger star is being pulled out of its normal shape by the white dwarf's gravity.

这个双星系统会周期性地变亮，亮度非常大。部分原因是较大的那颗恒星被那颗白矮星的引力拉扯出正常形状。

It is by observing how clouds change colour and shape that weather can be predicted, and as long as the first three types of cloud keep their normal shape there won't be any rain.

通过观察云如何改变颜色和形状可以预测天气，只要前三种云保持正常形状就不会下雨。