In 1974 a large area of the surface of Mercury was photographed from varying distances, which revealed a degree of cratering similar to that of the Moon's.
which revealed a degree of cratering similar to that of the Moon's
to reveal a degree of cratering similar to the Moon
revealing a degree of cratering similar to that of the Moon
and revealed cratering similar in degree to the Moon
that revealed cratering similar in degree to that of the Moon
①注意比较的对象问题
②v-ing可以直接修饰名词 // ,v-ing修饰动词(表示同时发生,逻辑主语要有含义) // 修饰前面的整个句子,表示结果
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